[Gnash] working plugin checked in

[Rob Savoye]

Well, your mileage may vary, but I just checked in a working version of 
a Firefox plugin. :-) There are likely bugs, but this was too fun to not 
let people play with it, even if I just got it working. I'll be 
stabilizing and improving this over the next few days.

This is very different from the previous versions. I'll apologize now 
adding more dependencies for those who want to build this from source. 
This version uses the GtkGLExt extension, which lets me create a GTK2 
widget like the rest of Firefox, that happens to be OpenGL aware. This 
simplified the problems of too many graphic contexts between X11, 
OpenGL, and Firefox.

This version also has a menu for right clicking the mouse that lets you 
control the movie, stopping, advancing frames, etc... Another big 
difference is for now, a new window is created external to the browser. 
That problem will go away when I figure out why gtk_plug() isn't doing 
what I want...

This version uses the standalone player in a way similar to MozPLugger 
by forking the standalone player, which is also now GTK based. If you 
don't have GtkGLExt installed, it'll default to the existing SDL 
support, which has no event handling or menus unfortunately. (which is 
why I wrote a new GTK front end)

Anyway, have fun, and please don't bury me in bug reports for a few days 
please. :-)

        - rob -