5.1.1 20170517
* Allow command FullTopic in group mode
* Prepare for more use of RTC memory
* Add independant WS2812 led string power control (#386, #390)
* Add command Counter<x> to control up to four GPIO falling edge
interrupt counters or timers (#459)
* Add command CounterType<x> to select between pulse counting or pulse
timing
* Add command CounterDebounce to select global counter debounce time in
mSec
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