Support for GIT REST API License Query

[ranadewa]

Querying for the license of the repository according to git api doesn't yield license information.

REST CALL
https://api.github.com/repos/rvagg/node-errno/license

OUTPUT
{
"message": "Not Found",
"documentation_url": "https://developer.github.com/v3/licenses/#get-the-contents-of-a-repositorys-license"
}

This might be due to not having a separate License file.