Since app is now persistent we need to push the apk
instead of installing it through regular adb command.

Reworking the README in order to document the eDrive behavior.
Authors and issues are tracked by git and gitlab so I have
removed these information.

EdriveApplication is the class instantiated before any other class
in the projet.

The application is set as persitent, meaning if it gets killed,
it will be respawned by the system. The application will also
start automatically at boot so BootCompleteReceiver becomes
useless.