added the timesystem as a parameter that needs to be compatible; implemented associated methods; in the timestep method, added an extra outlier removal step when the max diff is much larger than the mean diff (large gaps which corrupt the estimation of the time step); in the unwrap_datafiles, added an option to return the file names even if they do not exist and better handling of empty data files; in the import method, better handling of empty data files and added the time systems of the implemented formats; fixed small bug in the extend method, when the requested time is not exactly multiple of the time step; implemented compatible method
added the timesystem as a parameter that needs to be compatible; implemented associated methods; in the timestep method, added an extra outlier removal step when the max diff is much larger than the mean diff (large gaps which corrupt the estimation of the time step); in the unwrap_datafiles, added an option to return the file names even if they do not exist and better handling of empty data files; in the import method, better handling of empty data files and added the time systems of the implemented formats; fixed small bug in the extend method, when the requested time is not exactly multiple of the time step; implemented compatible method

jgte/orb,jgte/orb,jgte/orb,jgte/orb,jgte/orb