Bug fixes for the IRAF plugin

	modified:   FitsImage.py
	modified:   cmap.py
	modified:   ginga.py
	modified:   gtkw/GingaGtk.py
	modified:   gtkw/plugins/Debug.py
	modified:   gtkw/plugins/IRAF.py
	modified:   imap.py
	modified:   misc/plugins/IIS_DataListener.py
	modified:   misc/plugins/IRAFBase.py
	modified:   qtw/GingaQt.py
	modified:   qtw/plugins/Debug.py
	modified:   qtw/plugins/IRAF.py

- updated IRAF plugin
  - now supports "rimcur" and "tvmark" (tvmark plot colors are still not
      accurate)