Support for GAN Timer and other BT timers

[tejasraman]

Is your feature request related to a problem? Please describe if applicable.

The GAN Timer is a Bluetooth Rubik's cube timer that could conceivably be paired with CubeTime to allow for easier usage of the app. My brother uses the CubeTime app but finds that using an iPad/iPhone display as a stackmat is more difficult than using his GAN timer.

Describe the solution you'd like
Support for the GAN Timer should be added to the CubeTime app.