Allow for extra data in the array of series
Remove reference_list change
Deprecate kickr command channel

.. Wahoo don't do that anymore.

.. now use the same channel as the device and just send plain old
   ANT+ messages to set slope etc (why they didn't do that in the
   first place is absolutely beyond me)

.. getting ready to implement Kickr for the THIRD time !!!
Allow json series points to not have every value.