More MMI fixes

Fixed #1499
You can no longer evaporate brains yay.
Also viewers now get a message when you stick a brain into an mmi
Also I removed colon operators woo

I also added myself, Jordie, Kraso and Ergo to admins.txt. I hope you guys don't mind.
(I originally just added myself but then they asked to be added too so why not I guess)