GSOC 2014: Computational Photography 

a) Implementation of Intrinsic images. 
b) Implementation of Color transfer algorithms.
c) Implementation of Color constancy algorithms.

All modules added with test, documentation and demos.
word `benefit` contains bad unicode
![image](https://cloud.githubusercontent.com/assets/3304494/4354160/4805cfb6-423b-11e4-9c2a-b7f59849863c.png)