Version 1.2.0

* Ensures that if the app hasn’t got focus then we don’t consider the
accelerometer data (probably the alarm is going off)
* Ensure it’s own alarm doesn’t produce a movement spike
* Plot the start and end of the smart alarm period, plus now the time
the smart alarm actually went off.
* Visual clues to tie the start and end times against the graph
* Reduced the emphasis of the trend line - which is interesting but not
*that* interesting.