added a float based 1D kalman filter and integrated it with the accelerometer readings.  CURRENTLY NOT TUNED AT ALL
converted to more complex kalman filter
basic kalman filter ready for testing
Added compressed basic kalman filter.  It costs 38 bytes of flash
Merge branch 'master' of https://github.com/dhiltonp/hexbright into basic-1d-kalman-filter
merged a compressed, basic kalman filter at the cost of 38 bytes