Refactored Side Suppressor Shell Addition and Added Hevimet Addition Messenger Commands

The addition of the side suppressors has been refactored which reduced the code length by a healthy amount. I also removed a bunch of dead blocks that were present from previous changes. 

A messenger command has been added to include hevimets on the front of the side suppressors. The geometry for these is currently incorrect but the ability to add them has at least been included. This was not even possible before. The gui.mac file contains an example of how you would add them if you wanted to.