miscellany: reworking the plugins, har har har

Now, just 'cause my bro had to make a crack about my lackin' PHP abilities, I've started yet again on altering the plugins.

Got dept, deptlist, gridmail, authenticate updated.

Updated all with a spiffy new header with image.

Also added a user information lookup link to the deptlist results. Decided not to use the built-in directory listing function for just such a reason.