Add maxSegmentLength option

[luucvanderzee]

flubber has this maxSegmentLength option, which will add points to line segments until all line segments satisfy whatever number was passed to maxSegmentLength. So if you have a triangle where one side is 15 pixels long, and maxSegmentLength is 10, one extra point will be added to it in the middle. The result is a more smooth transition. The lower maxSegmentLength, the smoother the transition, but also the higher the performance penalty for adding more points.

We should:

• Implement our own maxSegmentLength option
• Decide what value we want to set this to by default, if we think this is desirable default behavior (if not, the default value can be infinity)