Added IntegralImage class for ByteProcessor
Added MeanPatchIntensityHistogram class

Descriptor constructs histogram of mean intensities in patches of specified size.
Added MeanIntensityLocalBinaryPatterns class

Descriptor creates histogram of local binary patterns based on
patch-based mean intensities obtained from MeanPatchIntensityHistogram class.
Convert non ByteProcessors and add support for masking
Implemented different version of local binary patterns

Returns one histogram of LBP for each pixel and considers circular neighborhood
Move classes to new lbp package