Kalman Filter Update

Added kalman filter library to git for testing
Kalman Filter Header

This is a filter for kalmans
Kalman Filter Code

This is the Kalman Filter header that may or may not work as intended.
Revert "Kalman Filter Code"

This reverts commit 79ce451de3c8acbbd1afc64fec2fe551ac1fd8bc.
Merge branch 'master' of https://github.com/briches/OpenSourceQuad