Factored side suppressor shell addition and removed dead code blocks.
Modified condition statements for adding suppressors. Functionality is unchanged.
Added messenger command for hevimets and placed them into a new assembly to remove the radial dependence
Updated gui.mac to include hevimet addition example.
Merge pull request #43 from tballast/master

Refactored Side Suppressor Shell Addition and Added Hevimet Addition Messenger Commands