* Added some EPUB specific config options to the Sphinx config file
  which might help reduce some of Sphinx's more stupid default errors
  with EPUB validation.
* Added lang/python/post_installer.py script for automating the
  generation of .texi and .rst "source" files from the real source
  files written in Org mode.  Includes recreating the Sphinx Makefile
  which is excluded due to the m4 toolchain in parent directories, it
  also handles the rewriting of the reST index file properly and
  rewrites the .texi files so they don't impale themselves on Unicode.