#3 IPC call to start a script

[shane]

Would be good to have an "IPC" call to start a script. it
wouldnt actually be inter-process, but would let other in-
process plugins start a script by simply sending the
filename to ActiveWinamp.

This would be a lot "lighter" than having to initialise
COM and call the "RunScript" method on teh
Application Interface.

In particular, I would like to use this in Toaster, to run
scripts on mouse actions on the Window, but other
plugins could use it too.