- added additional notes for visual editor
- updated code-generators
- added stub for "import" (mesh import)
- cleanup / experiments with shapes and transformcontrols
- continued fleshing out visual editor : perhaps time to move
some of the code to the overall editor
- VERY basic implementation of editing 2D shapes visually is "done":
 * extremely rough and limited for now
 * given a basic shape, allows moving main points and bezier control points
 * experimenting with shape2D class to achieve this
 * experimenting wiht seperating a shape's theoretical representation from
its "rendering"
 * very basic (no settings, just a given straight distance) extrusion
- added a few basic 2d shapes (accessible via context menu)
 * cube & circle
- updated edition of 2d shapes to work with all shape (see above)
- updated extrusion to generate instances of "Part" so that
boolean operations work as expected: fun !
- minor tweaks and cleanups