Starts monitoring for triggers.
By calling this method, it does not guarantee that a trigger event will be detected as you are required to be
meet various conditions. These include: the application being authenticated, having the correct hardware
(beacons), and having Bluetooth enabled on the device. When all these conditions have been met, and triggers have
been synchronised from TapPoint, then triggers will be monitored accordingly.
It is important to note that if monitoring becomes interrupted (i.e. Bluetooth is disabled), then upon Bluetooth
being re-enabled, monitoring will be resumed without needing to call this method again.