Merge pull request #10 from srahul07/master

merging constants.java file changes
Merge pull request #11 from guptachandan340/master

merging changes in constants.java file
Merge pull request #12 from srahul07/master

changes in constants.java file
All changes with category, genre, userinterests
All changes with category and genre related classes,splitting of
category table
Merge pull request #36 from Ankita-Malani/master

All changes with category and genre related classes,splitting of category table