glade changes

[George <jirka@5z.com>]

I just made some glade changes and I'd like to clean our setup even more.  It
used to be that they were installed into the pixmaps directory.  I changed it
so that they are installed into $(datadir)/dr-genius as all the other
software using glade, and there will be a define  that you use in the code
instead of hardcoding the path DRGENIUS_GLADEDIR.  I've changed all the
current stuff.

Anyway ... are there are problems with me moving the glade files into a glade
directory in the toplevel tree?  I don't think it's nice to have them in the
icons directory as they're most definately not icons :)

George