Smooth car rotation and movement

[tapanij]

Smooth vertical movement by interpolation and increased resolution of the collider ground mesh.

Interpolate the rotation also?

[tapanij]

This is the issue:

The real issue is having uneven updates for every frame (this is getting worse with more complex rendering / more slow GPU and is compounded by bad JS timer precisions / garbage collection, as shown by @mrdoob's line experiments). mrdoob/three.js#896

fps fix: cap fps to 30
Angry Birds fix: http://www.youtube.com/watch?v=F_sbusEUz5w&t=18m10s
Try it.

Profile with http://google.github.io/tracing-framework/

Currently without delta.