Build process + fixed issue#1

Started cleaning build process. Goal is to get rid of build scripts at all and remove modified `configure` from repo. 

+ Removed duplicating .zdist and .zin files. All distribution changes go into original `Setup.dist` and `pyconfig.in`.
+ Replaced 2,3,4 scripts with one `2build_zpython2.sh`
+ Removed host python compilation step. Using pre-installed host python.
+ Fixed issue #1