Refactored util/transforms.py translate, scale and rotate to just return

Refactored translate, scale and return to just return a matrix to be multiplied instead of the matrix multiplication being done in the method

Adapted scenen linear transforms as appropriate

Adapted examples as appropriate (except for ipython notebooks, cannot test those)
> So, I think we all agree that we need a way to support both degrees and radians. Therefore,
> I provided 'rotated' with the 'd' suffix borrowed from Matlab/Octave/... sind functions. Now the question is which should be the 'default'

Your comments make sense. I vote for `rotate` in radians (default), and `rotated` in degrees. Also: shoud `rotate` have a `degrees` keyword argument as well?