Crafty
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Crafty.math.Vector3D
this PR was split from #708
adds the Crafty.math.Vector3D feature and tests
Looks cool to me
adjusted the documentation for Vector3D.getNormal
@starwed
Is the inclusion of this feature worth the extra space in crafty-min.js
? If not, is there a way to place it into the commit history and remove it right away (it may come in handy in the future)?