Updated test cases. Verified supports multiple priorities correctly.
Added (broken) MultiLevelScheduler in very rough test mode.
Multilevel scheduler now working correctly with single level and
increase priority value after run. Need to implement decrease priority
value on wait and add other levels.

Fixed main terminating everything early for MultiLevelScheduler.
Multilevel now implements three levels.
Completed multilevel scheduler.
Merged KThread. Added DynamicPriorityScheduler.
Completed merge. Needs work to fix compile errors in
DynamicPriorityScheduler and testing to eliminate runtime errors.
Completed dynamic integration.
Fixing merge history to show dynamic was integrated into master.
Merge remote-tracking branch 'origin/master' into dynamic

Conflicts:
	nachos/src/nachos_thread.conf