Added FeedingSpeed and WaterChangeSpeed to RF class
Added RF.cpp
Changed WaterChangeMode to use constant for RF class
Changed default for Feeding/WC Speed to 255 (disabled).
ReefAngel class will now set Feeding_Start as usual. If FeedingSpeed is set
it will go into Constant speed on that mode.
Missing interrupt flags
Merge branch 'rfspeeds' of https://github.com/lnevo/Libraries.git into dev