added function getHeartrate()
move some hxm specific code (ConnectedListener class) to 'hxm' folder
remove unused exports, automatic 'TODO' lines
remove warnings
store heart rate as integer
remove code that gets speed data as this won't be used
fix heart rate display
move file logging to separate class
move heart rate interface to separate class
comments
moved code from main class to HrHandler class and HxmBluetooth class
moved code to HrHandler class and HxmBluetooth class
add comment to credit source
cleanup
close file cleanly on destruction
move more code to HrFileLogger
move hrFileLoggerHandler to HrFileLogger
clean up UI text
internal handler
clean up UI