[GCI-6 ] Added License file

[GCI-6 ] Added License file
https://www.google-melange.com/gci/task/view/google/gci2014/5020037333123072
Update license.txt
Update license.txt
Update license.txt
Rename license.txt to LICENSE
Merge pull request #5 from vivekkiran/master

[GCI-6 ] Added License file