initial version of the firefoxos proxy
change config from 'simplePush' to fireboxes to be inline with cordova naming and added support for firefoxos only config
removed hacked version, with freshly downloaded one
updated path and send data
correct successCallback/onNotification + fix plugin module loading
manage registrations properly

- unregister from all registrations except a first one
- register new endpoint only when required
- refresh existing registrations with UPS
Merge pull request #55 from lfryc/firefoxos

Support for Firefox OS