Merge pull request #122 from nebmo/wearPL1

Refactor live and workout interfaces
refactoring according to jonas comments
Merge pull request #123 from nebmo/wearPR2

Enable start/stop broadcasts to runactivity
issue#104 - reconnect after hrm looses connection. works fine for ble and 4.4.2 now. will continue on other combinations
add different rety/backoff scheme for connct/reconnect
fixes while testing of reconnect on nexus5
remove reconnect from bt20 to be handled by higher layer
ant+ reportDisconnected if getting hrValue == 0
Unbreak notifications
Prepare gradle for two versions