Releasing 1.2.3

This new release adds the following features:
 * The application now resume sending text messages even after the phone has been turned off and back on again.
 * The interval between alert can now be configured from the settings menu.
 * When settings are saved, a confirmation message is displayed.

It also fixes the following bugs:
 * Application updates can now be reinstalled by using the standard "replace" option.
 * A number of problems with the disguise not being displayed after exiting the app.
 * A problem when saving settings would exit the app.
 * A problem with crashing when restarting the setup wizard.

The following issues remain:

 * When restarting the installation, the hardware alarm test actually triggers the alarm instead of testing it.