Review deployment script

I recently added a deployment script and Travis deployment

I'd love if someone review it and write in this issue if there are things that could be better implemented.

Thanks!

Some info about what this script actually does: Every time a branch/pull request is being merged to the master branch, Travis execute the deployment script atdeploy/deploy.collections.js. This script connects to a MySQL database, checks to see what changed in collection/, and updates the database. (removes/changes/adds data, so it'll be exactly like collection/)

The MySQL database from above, is being used by the API to deliver the data. (see code)