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.

setup.py

@@ -702,6 +702,11 @@ class PyBuildExt(build_ext):
                     exts.append( Extension('zlib', ['zlibmodule.c'],
                                            libraries = ['z']) )
 
+        # Gustavo Niemeyer's bz2 module.
+        if (self.compiler.find_library_file(lib_dirs, 'bz2')):
+            exts.append( Extension('bz2', ['bz2module.c'],
+                                   libraries = ['bz2']) )
+
         # Interface to the Expat XML parser
         #
         # Expat was written by James Clark and is now maintained by a