Fixing likelihood computations
Added Log-likelihood expetation output

Ref #12
Some fixes to the model

Ref #12
Some final fixes on feature extraction
Max Bias Iterations implementation

ref #11, #12
Merge branch 'master' into fixBiasEstimator

Conflicts:
	Code/Numerics/Statistics/include/ImageBiasedGMModelEMEstimator.h
	Code/Numerics/Statistics/include/ImageBiasedGMModelEMEstimator.hxx