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
switched to a more familiar form of the compressed_kalman algorithm
added 'stdev_filter', which weights readings more heavily the further they are from our current value
converted filter name from compressed_kalman to low_pass_filter
added a stdev_filter that uses a compressed version of the cdf, as well as one converted to ints.  stdev_filter3 costs ~150 bytes over no filtering
altered programs to send shutdown signal only when entering OFF_STATE
spin_level now immediately turns on instead of waiting for spin data
moved to the 'digitalWriteFast' library, improving performance and saving 266 bytes
removed a junk file
added support for numeric input with input_digit and get_input_digit.  See numeric_input for use
Merge branch 'master' of git://github.com/dhiltonp/hexbright into dev_branch