+ To be consistent with Python version, parameter file has now a "_par.txt" extension and Raw tracking a _track.txt extension !!! Please rename your old parameter and tracking files.
+ It is now possible to save Raw data in both MAT (*_track.mat) and ASCII format (*_track.txt'). MAT is faster but larger. Note that the "Process filelist" button only saves in ASCII to save space.
+ Some other minor display corrections.

+ v1.2 (v1.2 2018)
+ v1.5a (v1.5a 24.07.2017)
+ v1.5 (v1.5 6.02.2017)
+ v1.41 (24.01.2017)
+ v1.4 (11.11.2016)
+ v1.3 (09.09.2016)
+ v1.21 (Standalone Linux/Mac 64bit)
+ v1.21 (Standalone Windows 64bit)

+ Possibility to execute tractrac both as a module (import tractrac) or directly in bash (python tractrac.py)
+ Integration of non-constant times step
+ Possibility to read an "interpolated" motion model image of U and V
+ Parameter file now called *_par.txt
+ Fixed some difference between Matlab and Python version, some diff remain notably in the error thresholds

+ v2.0 (v1.5 04.2018)
+ v1.5 (v1.5 6.02.2017)