Plot pitch / velocity
Gyro offset checks and filter reset
Teach plot states to deal with 21, 22 or 23 states
21 state estimator test
Generalize interface
Fix time offset handling in PX4 log converter tool
Include 21 state header
Switching to 23 state filter
Extend velocity plot
Extend error reporting and handling
Additional reporting state
Extend reporting
Loosen reset threshold to 20 m/s
Report excessive covariance reset
estimator_23states: Filter Stability Improvements

This patch changes the way that magnetometer, wind and terrain offset state
updates are inhibited to reduce the likelihood of an ill-conditioned covariance
matrix forming
Code: Add innovation plots
Not For Flight: Debug Code to disable GPS consistency checks
Not For Flight: disable mag, airspeed and range finder fusion for debugging