Bunch of cleanup type work.  Decided to package together all required icons regardless of if they are available elsewhere.  Added error page, apparantly I do indeed need one too.  Basically some adapting work to IntelliJ 6.0.

git-svn-id: http://svn.igniterealtime.org/svn/repos/wildfire/trunk/src/plugins/gateway@5653 b35dd754-fafc-0310-a699-88a17e54d16e