HyP3-lib v1.2.2

Fixed:

• rtc2color.py was applying the cleanup threshold differently to amplitude and
  power data, causing a loss of blue color, which has now been fixed.

Changed:

• rtc2color.py no longer performs calculations with the float16 data type,
  which was selected for memory optimization, and instead uses the native float32
  type. Similar memory optimizations have been achieved by refactoring and
  leveraging numpy, with an added benefit of a 6x speedup.