Expand MT2

1. Consider inv_mass = 0
2. Expand MT2 with different jets separation:
Eta0, j1j2, Razor_Jets
Add MET/sqrt(HT)
Update Makefile
Add Boosted variables

Consider MHT and HT boosted to the dijet frame
Add Razor 2D
Better print out
For Bjet studies
Update snowmass sample new location
Merge branch 'SUSYVar' into HTBin
Merge branch 'HTBin'

Conflicts:
	HStack/HTCom.C