cleanup: remove unused files from pybuild

the fucntionality changed already, these files are broken/unused.

reference: https://github.com/numenta/nupic/wiki/Configuration-and-Build-System

PS: Numenta: please check you dont use it for internal processes
add a TODO note
removed autobuild directory - replace by Travis CI functionality

https://github.com/numenta/nupic/wiki/Configuration-and-Build-System