Move common functions to CommonUtils.h
Merge branch 'LS1_Upgrade' of github.com:OSU-CMS/OSUT3Analysis into LS1_Upgrade
Added some comments.
Merge remote-tracking branch 'upstream/LS1_Upgrade' into composite_objects

Conflicts:
	AnaTools/plugins/Plotter.cc
Use getCollection() function instead of Event::getByLabel()
Use getCollection() function instead of Event::getByLabel()
Added some comments.
Merge remote-tracking branch 'upstream/LS1_Upgrade' into composite_objects

Conflicts:
	AnaTools/plugins/CutCalculator.cc
	AnaTools/plugins/ObjectSelector.cc
Cleaned up the code a bit.