Derivations: Fixed bug in 22 state derivation & added output files
Merge pull request #4 from LorenzMeier/master

PX4 flight stack logging format support, slight cleanup of C code graphing functionality
Merge branch 'master' of github.com:priseborough/InertialNav

# By Lorenz Meier (5) and priseborough (1)
# Via Lorenz Meier (1) and others
* 'master' of github.com:priseborough/InertialNav:
  Derivations: Fixed bug in 22 state derivation
  Moved variable to input parsing (were it belongs), covered corner / reachability cases with state booleans
  Add sample ZIP file to run the C code
  Writing out raw GPS data
  Added support for RAW GPS data, added consistent line colors and legends
  Added script to load PX4 logs (converted with mavtomfile.py and saved as .mat file)
Derivations: corrected save error in 22 state equations
Scripts: modified SITL flash data loader
Scripts: file to load text data produced by APM replay
...\ardupilot\libraries\AP_NavEKF\examples\AP_NavEKF
Scripts: file to load text data produced by APM replay
...\ardupilot\libraries\AP_NavEKF\examples\AP_NavEKF
Merge branch 'master' of github.com:priseborough/InertialNav

* 'master' of github.com:priseborough/InertialNav:
  Scripts: file to load text data produced by APM replay ...\ardupilot\libraries\AP_NavEKF\examples\AP_NavEKF
Scripts: updated reference to executable in FindBestDelay
Scripts: Updated plotting
Scripts: Updated plotting
Merge branch 'master' of github.com:priseborough/InertialNav

* 'master' of github.com:priseborough/InertialNav:
  Scripts: Updated plotting
scripts/PlotApmTestHarnessData.m : Updated to produce consistent style innovation plots
Derivations : Updated 23 state derivation to fuse optical flow measured LOS rates
Derivations: Updated derivation for optical flow - simplified equations
scripts/PlotFlightData.m : fixed errors in units and display of AHRS2 data
Merge branch 'master' of github.com:priseborough/InertialNav
Update to Pauls latest state