[compiz] Commenting switcher.c, switching between application windows.

[Christopher Halse Rogers]

Hello all.

I'd like to implement the ability to switch between just the windows
of the currently selected application (similar to the way OS:X does
it) to switcher.c.

As a part of actually understanding what's going on in there, I'll go
through and try to write doxygen comments the switcher.c functions.

Is there anyone else working on either the commenting or the switching
parts, to save me duplicating effort?