[Fluxus] video module

[gabor papp]

> Very nice! I think we should put all this in the distribution and figure
> out how to make modules optional at build time... Generally though, I'm
i tried to do this and made an addons directory with this module in it. 
i cannot test it on linux at the moment. so i might have broken the 
build. please try it, especially if you don't have the gstreamer 
development library installed, to check if the module is skipped during 
build time.

best,
gabor