[mtasc] fscommand support request

[Nicolas Cannasse]

> > As far as I know, fscommand the best way to make such conversations. If
> > you know better way could you please let me know?
>
> getURL works too for that (and is better?)
>
> getURL("javascript:window.close()")
>
>
> btw fscommand is more useful for the 'offline' stuff (not in webpages)
> it's used to hide the top menu and things like that when the swf played is
> in flashplayer.exe

I added fscommand to MTASC CVS.
BTW, it's pretty the same than getURL since the generated bytecode actually
simply add a "FSCommand:" to the first parameter before calling getURL....

Nicolas