Add a cache for the pixbufs, hashed on CID, so that we only have to make a

2000-10-02  Iain Holmes  <iain@helixcode.com>

	* mail-display.[ch]: Add a cache for the pixbufs, hashed on CID,
	so that we only have to make a thumbnail once.

2000-10-01  Iain Holmes  <iain@helixcode.com>

	* mail-display.c: Generate the thumbnails on an idle function so that
	the user interface isn't locked. Checks in case the widget it will
	use to display the image isn't destroyed.

svn path=/trunk/; revision=5653