[Fluxus] text/drscheme commits

[Dave Griffiths]

* Gabor's text improvements
* Decent integration with drscheme

Example script, from the drscheme IDE:

(require (lib "drflux.ss" "fluxus-0.14"))
(build-sphere 10 10)

Opens a fluxus window from inside drscheme and does the business - no
other setup required. every-frame etc should work as expected, code can
be entered from the drscheme repl too.

Downside - broken the mac build temporarily, change the path on line 10
of fluxus/modules/SConscript so the last part matches the result of
running (system-library-subpath) inside drscheme.

cheers,

dave