Change project structure, add basic code.

Project structure was changed in the following way:
 - The directory tree looks more like a usual Python project
 - Libraries written in C++ are no longer being used.
 - SCons is no longer being used.
 - *All* previous code is moved to \old directory.
 - Data preprocessing fundation is rewritten entirely in
   Python using scikit and numpy (not finished).
Move mails and management files.