Add language specification to Travis.yml
Define npm script for Travis default running

[#24]
Add grunt-cli to package.json

[#24]
Turn off email notifications for TravisCI.

[#24]
Revert "Add grunt-cli to package.json"

This reverts commit 0908184d776489d70fd18437a1568f774a23e675.
Revert "Revert "Add grunt-cli to package.json""

This reverts commit 252d4f485a907bbb44a953093587b3bdc9a50a41.
Install grunt-cli in a before script, not in the dev dependencies.
Merge pull request #50 from ckundo/update-travis-config

Revise TravisCI config to use npm script