bz2 tests to pass on Windows; most are still failing.
* 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.