Convert introduction and installation doc from Latex to Sphinx
diff --git a/doc/index.rst b/doc/index.rst
index fd79546..c083d3d 100644
--- a/doc/index.rst
+++ b/doc/index.rst
@@ -6,11 +6,17 @@
 Welcome to pyOpenSSL's documentation!
 =====================================
 
+This module is a rather thin wrapper around (a subset of) the OpenSSL library.
+With thin wrapper I mean that a lot of the object methods do nothing more than
+calling a corresponding function in the OpenSSL library.
+
 Contents:
 
 .. toctree::
    :maxdepth: 2
 
+   introduction
+   install
    api
 
 Indices and tables