Package cleanup.

MANIFEST.in

 include MANIFEST.in README.txt INSTALL.txt ToDo.txt USAGE.txt
-include COPYING.txt LICENSE.txt Makefile
+include COPYING.txt LICENSE.txt PKG-INFO Makefile
 include .hgrev
 include setup.py
+include setupegg.py
 include bin/*
 include cython.py
-include Cython/Compiler/Lexicon.pickle
 recursive-include Cython *.pyx *.pxd
 include Doc/*
 
@@ -13,6 +13,7 @@ include Demos/*.py
 include Demos/callback/*
 include Demos/embed/*
 include Demos/freeze/*
+include Demos/libraries/*
 include Demos/Setup.py
 include Demos/Makefile*
 recursive-include Tools *