Add performance improvement of _getMonoCurves() by filtering curves that have end points and control points sorted in y direction.
Add performance improvement of _getMonoCurves() by filtering curves that have end points and control points sorted in y direction.

iconexperience/paper.js,lehni/paper.js,iconexperience/paper.js,iconexperience/paper.js,lehni/paper.js,lehni/paper.js