Trying (and failing) at the moment to update contours interactively...
Now deleting and adding verts is ok, but still triggers scene_update...
Interactively updating\!ZZOMGDFDXFDXFJDK
Fixed a bug where mode_set was throwing RuntimeError in BlendSegOperator.execute
i'm comming a stupid file
Removing a stupid file
Only compute contours if the plane or mesh has been updated.

Added a __str__ method for IntersectionPoint to make it easier to debug. There is still a niggling bug for some instances of the compute contour code. For some reason, unable to remove an ixp from the list.
Formatting for README and remove a print() message in BlendSeg.
Removed some old, commented code
Added more graceful error handling for an exception occurring in contour ordering code.

Not sure where this problem is coming from, however it is an intermittent problem and I don't have a reproduceable test case yet. As of now, the tool continues to work seemingly without problems, so I'm not sure if this deserves more attention or not...