[fluxus] 0.12 docs etc

[Dave Griffiths]

reset-camera in clear
mouse-over code in documentation
primitives description
document $HOME/.fluxus/startup.scm
primitiveids of 0??
(load-texture pngfilename-string) -> force-load-texture
rewrite intro
(clear) in quickstart script
test scene/editor camera switching
state machine stack description
livecode recorder + docs in making movies
making movies docs - (edit)
add (fluxus-init) to drscheme docs