Add autoupdater.

Added automatic updater for the grades. It generates an Alarm, both when activated and when the device restarts.
Tested on emulator and working.
Add preferences update on automatic update.

Now the application logs when automatic connections are done.
Set first run.

Set first run for Record Activity (only useful when starting with data, on the login screen it is not useful)
Not working. Needs help on the alarms.