modification: on itemtypes management screen, useless form are replaced by

modification: on itemtypes management screen, useless form are replaced by
simple links.

improvement: support of itemtype icons on prog template. The icons are
displayed on itemtypes management screen and on moremember screen.

improvement: use of pagination_bar on itemtypes management screen.

new: function were added in C4::Koha to manage itemtype image location
(local/remote). Warning: you must copy or symlink the itemtypeimg directory
from the opac template into the intranet template.