Added default mode to debugging, as we test now.

Summary:
Made default runserver to go in debug mode.
There is a bug with static files files w/o debug that I cannot figure out.

Test Plan:
Don't apply the patch and try to do ./runserver.
Static files should be failing...

Reviewers: bogdan2412

Reviewed By: bogdan2412

Differential Revision: http://phab.code4fun.de/D8