[fluxus] commits

[dave griffiths]

* (build-seg-plane) takes x,y tesselation values and builds a poly plane
* fixed a problem with copying pdata
* added a new mode to the particle primitive so you can render textured
sprites (I'll be expanding it a little more to allow different sized
sprites etc)
* (recalc-normals) works for polygons, and smoothes the normals - I'll
make this optional.
* lots of fixes to the editor
* some misc bugs fixes with gl state
* thanks to the upcoming workshop, I've been forced to do loads of new
html documentation with pics (cheers to Nik for helping out)

been messing with some simple npr techniques too:
http://www.pawfal.org/nebogeo/images/npr1.png
http://www.pawfal.org/nebogeo/images/npr2.png

cheers,

dave