Ben's first commit -- added fields to struct thread, added functions to get and set those fields (niceness,load_avg,cpu_time). Also added a list of queues for the mlfqs tiered priority queues. Also made a lock for that list.
Merge remote-tracking branch 'origin/ben_dev' into ralph_dev
Small merge error
Made change to lock_acquire, added lock_waiting_for/original_priority in thread struct, and donate_priority