Guided by Jacub Stener's mail, where he explaned which icons were renamed or
added, I added a bunch of new icons to menus, fixed renamed ones. Changed Trash
and Executive summary folder type icons. Fixed art/Makefile.am for these
changes.
Also, pulled icon cache from mailer and moved it to e-util/e-gui-utils.h, made
all components and dialogs use cache and not load pixmaps every time.
Accidentally got a couple of includes fix in, but they won't break anything.
svn path=/trunk/; revision=9092