added zpace buffer and continuous/invert options
changed callback structure of flipping
added halting for non-continuous flippers
angle refactor
correctly culling negative space normals
simplified API, removed culling and other extra state
Merge pull request #9 from FamousInternal/flipperImprovements-eagle

Flipper improvements eagle
Merge pull request #2 from FamousInternal/flipperImprovements

Flipper improvements