Don't maximize the window by default since this has undefined behaviour on X11 (and Windows, it seems). Kill the status bar. Set the taskbar icon on windows.
Preliminary reorganization into Python packages
Move class definition from executable file to source tree.
Implement TrackMarker and MarkerList classes.
Implement ReferenceLine class. Allow redrawing of a reference line when re-clicking in the draw reference mode. Don't set/draw the reference line if the initial and final points are the same.
Implement MomentumArc class. Draw arcs instead of pies for fits.
Merge branch 'cleanup'