#238 Make SciPy/NumPy/PyGame a dependency in the egg

[Katherine Ann Scott]

Instead of shouting in the docs that users must MUST MUST install SciPy/NumPy, consider making SciPy/NumPy a dependency in the egg. The whole point of SimpleCV is making opencv easy; this sort of thing should be automated.

The docs seem to indicate that either SciPy or NumPy is sufficient. Whichever is better suited for use with SimpleCV should have a dependency entry in the egg.

Ditto for PyGame.

See:
https://github.com/ingenuitas/SimpleCV/issues/17