Changes:
- Improvement: boolean operations should work faster. It is especially related to merging surface volumes.
Color information will be correctly transformed. It is recommended to merge small volume->big volume, it will work faster. - Bugfix: fixed problem of using spline stroke with small pen radius (there was radius when nothing was drawn)
- Bugfix: fixed problem of seams over UV pieces that are outside of [0..1] UV square
- Bugfix: fixed different problems related to seamlessness of painting
- Additional fixes: a lot of mantis related problems fixed.