better exception handling and log to debug stability issues; removed stopSelf from DexcomG4Service.isConnected; try harder to get the serial device; some minor clean up
Merge pull request #1 from jasoncalabrese/feature/up-all-night

Changes to prevent hanging when the service gets destroyed
Merge remote-tracking branch 'upstream/master'
Rolling back previous merge due to failure of power toggle on rooted
devices after update. I did remove the stopSelf() call that was hanging
the service when the USB connection was temporarily out.
Merge remote-tracking branch 'upstream/master'
Merge branch 'master' into feature/json-post