Scripting: Added Geometry interface with line and ellipse helpers

[bjorn]

Providing access from scripts to the existing line and ellipse rendering functions.

[eishiya]

In the comments for ellipseRegion, it would be a good idea to specify whether the parameters represent a bounding rect, or the origin and radius.

[eishiya]

When using Geometry.ellipseRegion(rect) with a Qt.rect(x,y,0,0), the result is a 2x2 rectangle with x,y at its bottom right corner. I would expect an ellipse with width or height 0 to be either an empty region, or to replace the 0 width and/or height with 1.

This doesn't affect the version that takes numbers, since that takes inclusive points for the rect, and thus cannot make a rectangle with width or height 0.