BG/Q ready for prime time.

In the process:
- Improved interface of Scheduler Class.
- Implemented slot status for Torus scheduler.
- Moved most BG/Q specifics into the LoadLevelerLRMS.
- Torus Scheduler is now semi-resource-agnostic.
- Make use of opaque task slot.
- Convert prints into logging calls.
- Changed some indenting to shorten lines.
- Added comments and TODO's here and there.