Cameras should be based on quaternions

[einarf]

These are currently based good old look_at, but should probably use quaternions to make them into fully 3d cameras without too much hassle.

[yoyonel]

Good idea, i will take a look on that.

[einarf]

Nice. Might be a good idea to introduce a 3rd camera class for now. I think the system camera is decent enough as it is unless you would want to see any new features.

What I am mainly looking for is a camera that can be used freely in effects and scenes. The current cameras were written in a hurry and there was really no plan behind them.