Patch implementing bz2 module.

* setup.py
  (PyBuildExt.detect_modules): Included bz2 module detection.

* Modules/bz2module.c
* Lib/test/test_bz2.py
* Doc/lib/libbz2.tex
  Included files implementing, testing, and documenting bz2 module.

* Doc/Makefile.deps
* Doc/lib/lib.tex
  Include references to libbz2.tex.

* Misc/NEWS
  (Library): Mention distutils' c++ linkage patch, and new bz2 module.
diff --git a/Doc/lib/lib.tex b/Doc/lib/lib.tex
index 6b52d63..23444f6 100644
--- a/Doc/lib/lib.tex
+++ b/Doc/lib/lib.tex
@@ -169,6 +169,7 @@
 \input{libbsddb}
 \input{libzlib}
 \input{libgzip}
+\input{libbz2}
 \input{libzipfile}
 \input{libreadline}
 \input{librlcompleter}