Cython interface compiles, but doesn't work

Trying to import the cython-generated interface module to python causes
the process to (unbreakably) hang indefinitely
Fixes hanging import

The static declaration of the user::bot_db and user::trade_db attributes
was causing the import hanging, as CPython has a global import lock,
which was causing the hanging

http://stackoverflow.com/questions/1162461/python-hangs-when-importing-swig-generated-wrapper

The build process is not totally worked out yet (make names the
extension incorrectly), but the code itself works, and runs;
I haven't checked functionality yet, but the wrapper class
initializes properly
Merge branch 'develop-cython' into develop

Conflicts:
	cryptobot/bots/Makefile
	cryptobot/bots/config.mk
	cryptobot/bots/interface.pyx