New freeze.t test
Removed useless, slow, code
Skip slow gap detection if we aren't going to fill gaps anyway
Slight optimization
Optimization in Polyline instantiation
Use dclone() in Polyline and ExPolygon too
Use dclone() in Point class too
Optimization: don't store wipe path if wipe is not requested
Prefer starting points that are NOT in overhangs
One more fix in overhang starting point detection
Fix starting point after overhang clipping is performed
Merge branch 'master' into xs