[fluxus] commits

[Dave Griffiths]

* (get-projection-transform) gets the projection matrix
* (get-screen-size) returns the resolution as a two value vector
* (set-screen-size (vector x y)) sets the res, and updates the window to
match

also, in libfluxus/src/State.h, there is now a line:
#define ENABLE_MULTITEXTURE
which can be commented out as a stopgap measure until I figure out how to
autodetect it.

and I changed the cursor to yellow to make it a bit more visible. maybe we
should randomise it on f9 like the text.

cheers,

dave