Replaces included sip icons with Ryans new ones.
Applied Ryan's suggestions for a better filter look/feel on the registrations page.
Added new library files to plugins.iml.

git-svn-id: http://svn.igniterealtime.org/svn/repos/wildfire/trunk/src/plugins/gateway@7107 b35dd754-fafc-0310-a699-88a17e54d16e