Backport master's README.rst to 3.6 (GH-86)

Includes GH-2, GH-70, GH-73 (GH-79), and GH-21.
diff --git a/README b/README
deleted file mode 100644
index 03c4b03..0000000
--- a/README
+++ /dev/null
@@ -1,242 +0,0 @@
-This is Python version 3.6.1 release candidate 1
-================================================
-
-Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011,
-2012, 2013, 2014, 2015, 2016, 2017 Python Software Foundation.  All rights
-reserved.
-
-Python 3.x is a new version of the language, which is incompatible with the
-2.x line of releases.  The language is mostly the same, but many details,
-especially how built-in objects like dictionaries and strings work,
-have changed considerably, and a lot of deprecated features have finally
-been removed.
-
-Using Python
-------------
-
-Installable Python kits, and information about using Python, are available at
-`python.org`_.
-
-.. _python.org: https://www.python.org/
-
-
-Build Instructions
-------------------
-
-On Unix, Linux, BSD, OSX, and Cygwin:
-
-    ./configure
-    make
-    make test
-    sudo make install
-
-This will install Python as python3.
-
-You can pass many options to the configure script; run "./configure --help" to
-find out more.  On OSX and Cygwin, the executable is called python.exe;
-elsewhere it's just python.
-
-On Mac OS X, if you have configured Python with --enable-framework, you should
-use "make frameworkinstall" to do the installation.  Note that this installs the
-Python executable in a place that is not normally on your PATH, you may want to
-set up a symlink in /usr/local/bin.
-
-On Windows, see PCbuild/readme.txt.
-
-If you wish, you can create a subdirectory and invoke configure from there.
-For example:
-
-    mkdir debug
-    cd debug
-    ../configure --with-pydebug
-    make
-    make test
-
-(This will fail if you *also* built at the top-level directory.
-You should do a "make clean" at the toplevel first.)
-
-To get an optimized build of Python, "configure --enable-optimizations" before
-you run make.  This sets the default make targets up to enable Profile Guided
-Optimization (PGO) and may be used to auto-enable Link Time Optimization (LTO)
-on some platforms.  For more details, see the sections bellow.
-
-
-Profile Guided Optimization
----------------------------
-
-PGO takes advantage of recent versions of the GCC or Clang compilers.
-If ran, "make profile-opt" will do several steps.
-
-First, the entire Python directory is cleaned of temporary files that
-may have resulted in a previous compilation.
-
-Then, an instrumented version of the interpreter is built, using suitable
-compiler flags for each flavour. Note that this is just an intermediary
-step and the binary resulted after this step is not good for real life
-workloads, as it has profiling instructions embedded inside.
-
-After this instrumented version of the interpreter is built, the Makefile
-will automatically run a training workload. This is necessary in order to
-profile the interpreter execution. Note also that any output, both stdout
-and stderr, that may appear at this step is suppressed.
-
-Finally, the last step is to rebuild the interpreter, using the information
-collected in the previous one. The end result will be a Python binary
-that is optimized and suitable for distribution or production installation.
-
-
-Link Time Optimization
-----------------------
-
-Enabled via configure's --with-lto flag.  LTO takes advantages of recent
-compiler toolchains ability to optimize across the otherwise arbitrary .o file
-boundary when building final executables or shared libraries for additional
-performance gains.
-
-
-What's New
-----------
-
-We have a comprehensive overview of the changes in the "What's New in
-Python 3.6" document, found at
-
-    https://docs.python.org/3.6/whatsnew/3.6.html
-
-For a more detailed change log, read Misc/NEWS (though this file, too,
-is incomplete, and also doesn't list anything merged in from the 2.7
-release under development).
-
-If you want to install multiple versions of Python see the section below
-entitled "Installing multiple versions".
-
-
-Documentation
--------------
-
-Documentation for Python 3.6 is online, updated daily:
-
-    https://docs.python.org/3.6/
-
-It can also be downloaded in many formats for faster access.  The documentation
-is downloadable in HTML, PDF, and reStructuredText formats; the latter version
-is primarily for documentation authors, translators, and people with special
-formatting requirements.
-
-If you would like to contribute to the development of Python, relevant
-documentation is available at:
-
-    https://docs.python.org/devguide/
-
-For information about building Python's documentation, refer to Doc/README.txt.
-
-
-Converting From Python 2.x to 3.x
----------------------------------
-
-Python starting with 2.6 contains features to help locating code that needs to
-be changed, such as optional warnings when deprecated features are used, and
-backported versions of certain key Python 3.x features.
-
-A source-to-source translation tool, "2to3", can take care of the mundane task
-of converting large amounts of source code.  It is not a complete solution but
-is complemented by the deprecation warnings in 2.6.  See
-https://docs.python.org/3.6/library/2to3.html for more information.
-
-
-Testing
--------
-
-To test the interpreter, type "make test" in the top-level directory.
-The test set produces some output.  You can generally ignore the messages
-about skipped tests due to optional features which can't be imported.
-If a message is printed about a failed test or a traceback or core dump
-is produced, something is wrong.
-
-By default, tests are prevented from overusing resources like disk space and
-memory.  To enable these tests, run "make testall".
-
-IMPORTANT: If the tests fail and you decide to mail a bug report, *don't*
-include the output of "make test".  It is useless.  Run the failing test
-manually, as follows:
-
-    ./python -m test -v test_whatever
-
-(substituting the top of the source tree for '.' if you built in a different
-directory).  This runs the test in verbose mode.
-
-
-Installing multiple versions
-----------------------------
-
-On Unix and Mac systems if you intend to install multiple versions of Python
-using the same installation prefix (--prefix argument to the configure script)
-you must take care that your primary python executable is not overwritten by the
-installation of a different version.  All files and directories installed using
-"make altinstall" contain the major and minor version and can thus live
-side-by-side.  "make install" also creates ${prefix}/bin/python3 which refers to
-${prefix}/bin/pythonX.Y.  If you intend to install multiple versions using the
-same prefix you must decide which version (if any) is your "primary" version.
-Install that version using "make install".  Install all other versions using
-"make altinstall".
-
-For example, if you want to install Python 2.7, 3.5, and 3.6 with 3.6 being the
-primary version, you would execute "make install" in your 3.6 build directory
-and "make altinstall" in the others.
-
-
-Issue Tracker and Mailing List
-------------------------------
-
-We're soliciting bug reports about all aspects of the language.  Fixes are also
-welcome, preferably in unified diff format.  Please use the issue tracker:
-
-    https://bugs.python.org/
-
-If you're not sure whether you're dealing with a bug or a feature, use the
-mailing list:
-
-    python-dev@python.org
-
-To subscribe to the list, use the mailman form:
-
-    https://mail.python.org/mailman/listinfo/python-dev/
-
-
-Proposals for enhancement
--------------------------
-
-If you have a proposal to change Python, you may want to send an email to the
-comp.lang.python or `python-ideas`_ mailing lists for initial feedback.  A Python
-Enhancement Proposal (PEP) may be submitted if your idea gains ground.  All
-current PEPs, as well as guidelines for submitting a new PEP, are listed at
-https://www.python.org/dev/peps/.
-
-.. _python-ideas: https://mail.python.org/mailman/listinfo/python-ideas/
-
-Release Schedule
-----------------
-
-See PEP 494 for release details: https://www.python.org/dev/peps/pep-0494/
-
-
-Copyright and License Information
----------------------------------
-
-Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011,
-2012, 2013, 2014, 2015, 2016 Python Software Foundation.  All rights reserved.
-
-Copyright (c) 2000 BeOpen.com.  All rights reserved.
-
-Copyright (c) 1995-2001 Corporation for National Research Initiatives.  All
-rights reserved.
-
-Copyright (c) 1991-1995 Stichting Mathematisch Centrum.  All rights reserved.
-
-See the file "LICENSE" for information on the history of this software,
-terms & conditions for usage, and a DISCLAIMER OF ALL WARRANTIES.
-
-This Python distribution contains *no* GNU General Public License (GPL) code,
-so it may be used in proprietary projects.  There are interfaces to some GNU
-code but these are entirely optional.
-
-All trademarks referenced herein are property of their respective holders.
diff --git a/README.rst b/README.rst
new file mode 100644
index 0000000..d02ae64
--- /dev/null
+++ b/README.rst
@@ -0,0 +1,235 @@
+This is Python version 3.6.1 release candidate 1
+================================================
+
+.. image:: https://travis-ci.org/python/cpython.svg?branch=3.6
+   :alt: CPython build status on Travis CI
+   :target: https://travis-ci.org/python/cpython
+
+.. image:: https://codecov.io/gh/python/cpython/branch/3.6/graph/badge.svg
+   :alt: CPython code coverage on Codecov
+   :target: https://codecov.io/gh/python/cpython
+
+Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011,
+2012, 2013, 2014, 2015, 2016, 2017 Python Software Foundation.  All rights
+reserved.
+
+See the end of this file for further copyright and license information.
+
+
+Using Python
+------------
+
+Installable Python kits, and information about using Python, are available at
+`python.org`_.
+
+.. _python.org: https://www.python.org/
+
+
+Build Instructions
+------------------
+
+On Unix, Linux, BSD, OSX, and Cygwin::
+
+    ./configure
+    make
+    make test
+    sudo make install
+
+This will install Python as python3.
+
+You can pass many options to the configure script; run ``./configure --help``
+to find out more.  On OSX and Cygwin, the executable is called ``python.exe``;
+elsewhere it's just ``python``.
+
+On Mac OS X, if you have configured Python with ``--enable-framework``, you
+should use ``make frameworkinstall`` to do the installation.  Note that this
+installs the Python executable in a place that is not normally on your PATH,
+you may want to set up a symlink in ``/usr/local/bin``.
+
+On Windows, see `PCbuild/readme.txt
+<https://github.com/python/cpython/blob/3.6/PCbuild/readme.txt>`_.
+
+If you wish, you can create a subdirectory and invoke configure from there.
+For example::
+
+    mkdir debug
+    cd debug
+    ../configure --with-pydebug
+    make
+    make test
+
+(This will fail if you *also* built at the top-level directory.  You should do
+a ``make clean`` at the toplevel first.)
+
+To get an optimized build of Python, ``configure --enable-optimizations``
+before you run ``make``.  This sets the default make targets up to enable
+Profile Guided Optimization (PGO) and may be used to auto-enable Link Time
+Optimization (LTO) on some platforms.  For more details, see the sections
+below.
+
+
+Profile Guided Optimization
+---------------------------
+
+PGO takes advantage of recent versions of the GCC or Clang compilers.  If ran,
+``make profile-opt`` will do several steps.
+
+First, the entire Python directory is cleaned of temporary files that may have
+resulted in a previous compilation.
+
+Then, an instrumented version of the interpreter is built, using suitable
+compiler flags for each flavour. Note that this is just an intermediary step
+and the binary resulted after this step is not good for real life workloads, as
+it has profiling instructions embedded inside.
+
+After this instrumented version of the interpreter is built, the Makefile will
+automatically run a training workload. This is necessary in order to profile
+the interpreter execution. Note also that any output, both stdout and stderr,
+that may appear at this step is suppressed.
+
+Finally, the last step is to rebuild the interpreter, using the information
+collected in the previous one. The end result will be a Python binary that is
+optimized and suitable for distribution or production installation.
+
+
+Link Time Optimization
+----------------------
+
+Enabled via configure's ``--with-lto`` flag.  LTO takes advantage of the
+ability of recent compiler toolchains to optimize across the otherwise
+arbitrary ``.o`` file boundary when building final executables or shared
+libraries for additional performance gains.
+
+
+What's New
+----------
+
+We have a comprehensive overview of the changes in the `What's New in Python
+3.6 <https://docs.python.org/3.6/whatsnew/3.6.html>`_ document.  For a more
+detailed change log, read `Misc/NEWS
+<https://github.com/python/cpython/blob/3.6/Misc/NEWS>`_, but a full
+accounting of changes can only be gleaned from the `commit history
+<https://github.com/python/cpython/commits/3.6>`_.
+
+If you want to install multiple versions of Python see the section below
+entitled "Installing multiple versions".
+
+
+Documentation
+-------------
+
+`Documentation for Python 3.6 <https://docs.python.org/3.6/>`_ is online,
+updated daily.
+
+It can also be downloaded in many formats for faster access.  The documentation
+is downloadable in HTML, PDF, and reStructuredText formats; the latter version
+is primarily for documentation authors, translators, and people with special
+formatting requirements.
+
+If you would like to contribute to the development of Python, relevant
+documentation is available in the `Python Developer's Guide
+<https://docs.python.org/devguide/>`_.
+
+For information about building Python's documentation, refer to `Doc/README.txt
+<https://github.com/python/cpython/blob/3.6/Doc/README.txt>`_.
+
+
+Converting From Python 2.x to 3.x
+---------------------------------
+
+Significant backward incompatible changes were made for the release of Python
+3.0, which may cause programs written for Python 2 to fail when run with Python
+3.  For more information about porting your code from Python 2 to Python 3, see
+the `Porting HOWTO <https://docs.python.org/3/howto/pyporting.html>`_.
+
+
+Testing
+-------
+
+To test the interpreter, type ``make test`` in the top-level directory.  The
+test set produces some output.  You can generally ignore the messages about
+skipped tests due to optional features which can't be imported.  If a message
+is printed about a failed test or a traceback or core dump is produced,
+something is wrong.
+
+By default, tests are prevented from overusing resources like disk space and
+memory.  To enable these tests, run ``make testall``.
+
+If any tests fail, you can re-run the failing test(s) in verbose mode::
+
+    make test TESTOPTS="-v test_that_failed"
+
+If the failure persists and appears to be a problem with Python rather than
+your environment, you can `file a bug report <https://bugs.python.org>`_ and
+include relevant output from that command to show the issue.
+
+
+Installing multiple versions
+----------------------------
+
+On Unix and Mac systems if you intend to install multiple versions of Python
+using the same installation prefix (``--prefix`` argument to the configure
+script) you must take care that your primary python executable is not
+overwritten by the installation of a different version.  All files and
+directories installed using ``make altinstall`` contain the major and minor
+version and can thus live side-by-side.  ``make install`` also creates
+``${prefix}/bin/python3`` which refers to ``${prefix}/bin/pythonX.Y``.  If you
+intend to install multiple versions using the same prefix you must decide which
+version (if any) is your "primary" version.  Install that version using ``make
+install``.  Install all other versions using ``make altinstall``.
+
+For example, if you want to install Python 2.7, 3.5, and 3.6 with 3.6 being the
+primary version, you would execute ``make install`` in your 3.6 build directory
+and ``make altinstall`` in the others.
+
+
+Issue Tracker and Mailing List
+------------------------------
+
+Bug reports are welcome!  You can use the `issue tracker
+<https://bugs.python.org>`_ to report bugs, and/or submit pull requests `on
+GitHub <https://github.com/python/cpython>`_.
+
+You can also follow development discussion on the `python-dev mailing list
+<https://mail.python.org/mailman/listinfo/python-dev/>`_.
+
+
+Proposals for enhancement
+-------------------------
+
+If you have a proposal to change Python, you may want to send an email to the
+comp.lang.python or `python-ideas`_ mailing lists for initial feedback.  A
+Python Enhancement Proposal (PEP) may be submitted if your idea gains ground.
+All current PEPs, as well as guidelines for submitting a new PEP, are listed at
+`python.org/dev/peps/ <https://www.python.org/dev/peps/>`_.
+
+.. _python-ideas: https://mail.python.org/mailman/listinfo/python-ideas/
+
+
+Release Schedule
+----------------
+
+See :pep:`494` for Python 3.6 release details.
+
+
+Copyright and License Information
+---------------------------------
+
+Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011,
+2012, 2013, 2014, 2015, 2016 Python Software Foundation.  All rights reserved.
+
+Copyright (c) 2000 BeOpen.com.  All rights reserved.
+
+Copyright (c) 1995-2001 Corporation for National Research Initiatives.  All
+rights reserved.
+
+Copyright (c) 1991-1995 Stichting Mathematisch Centrum.  All rights reserved.
+
+See the file "LICENSE" for information on the history of this software, terms &
+conditions for usage, and a DISCLAIMER OF ALL WARRANTIES.
+
+This Python distribution contains *no* GNU General Public License (GPL) code,
+so it may be used in proprietary projects.  There are interfaces to some GNU
+code but these are entirely optional.
+
+All trademarks referenced herein are property of their respective holders.