Create Histogram module for calculation & Equalization

[akarsh]

I had created the Histogram Calculation, and, Histogram Equalization with the reference to the documentation from OpenCV

http://docs.opencv.org/doc/tutorials/imgproc/histograms/histogram_equalization/histogram_equalization.html

http://docs.opencv.org/doc/tutorials/imgproc/histograms/histogram_calculation/histogram_calculation.html

Made changes to calculate the histogram for grayscale images, as it was not present in the open cv documentation.

Request for code review

here are the files

https://github.com/akarsh/uipf/blame/akarsh-patch-2/code/modules/improc/CalculateHistModule.cpp

https://github.com/akarsh/uipf/blame/akarsh-patch-2/code/modules/improc/HistogramEqualizationModule.cpp

[cebe]

Request for code review

for code review, please send a pull request from that branch (use a new branch for each pull request). Using pull request it is easier to review and one can directly comment on the code lines.

[akarsh]

I made one pull request, NO one commented on it.
So, i did not make further.
Here is the new one with only branch with the files.
#118