Initial split of global clock to local ones.
Stub no dvfs class.
Minor clocking bugfixes.
Actually create dvfs controller.
Fix missed trace build.
Remove leftover print.
Add configurable scheduler tick.
Merge branch 'dvfs' into cs246

Conflicts:
	slave.c
Update DRAMSim2 reference to fork.
Merge branch 'master' into dvfs
Merge branch 'dvfs' into cs246