Combine MLSampling{2,3}.h into MLSampling1.h
Remove trailing whitespace
Separate implementation of MLSampling
Rename MLSampling1 -> MLSampling
Remove some outdated comments
Add MLSampling operator<< implementation
Merge remote-tracking branch 'origin/sep_impl_ml' into dev

Conflicts:
	inc/queso/Makefile.am
	src/gp/inc/GcmTotalInfo.h
	src/stats/inc/MLSampling1.h
	src/stats/inc/MLSampling2.h
	src/stats/inc/MLSampling3.h
	src/stats/inc/StatisticalInverseProblem.h