More code cleaning

* docstring for a few more analysis
* less obfuscated code
Fix bug in Globals

The __builtin__ module is obviously always preloaded...
PEP8 compliancy
Adding file support based on C FILEs.
Needs reimplementation of core::string to insure better performances.
Merge pull request #57 from artas360/master

Adding file support based on C FILEs.