When a track's control point is deleted, smooth out the new track by moving a point adjacent to the moved control point, see #177
When a track is cut, smooth the new tracks, see #177
Added back "navigate to save url", see #182
Moved navigate to save url to a query parameter, see #182
updated formatting
Updated credits, closes #183
Reset the skater when the track is changed, see #179
updated version to 1.0.0-rc.12
updated version to 1.0.0-rc.13