token api for chrome extension / other 3rd party apps
Merge changes from ztbrown/phone-home:create-api.

Related to #4 and #5.

* Merge in all changes from ztbrown/phone-home:create-api.
* Added `thin` as webserver to speed things up a bit.
* Removed duplicate `sqlite3` declaration in Gemfile.
* Added spec for `Api::V1::TrackersController`.
* Fixed issue with redirect in trackers #deactivate action.
* Fixed default value for tracker active attribute.
* Added factory for trackers.
* Minor code cleanup.