Minor changes to project distribution options

* Added an operating system and a topic project classifier to setup.py
* Modified setup.cfg to tag the wheel builds as only python2 compatible for now
* Modified the Makefile to build and upload (to pypi) a zip file as well as a
  tar.gz file
Added INSTALL.rst to package data (MANIFEST.in)
Changed the way HISTORY info is written
Modifiy 'make clean' to also delete *.py-e files