Radial distance / Suppressor control. 

I have modified the code so that the radial distance of the detectors can be set to an arbitrary value, and the suppressors can be turned on or off. Evans recent changes also allowed me to add control to where a specific detector of placed. So, since the dead layer is slightly different on each detector, it is now possible to take any detector and place it in any location. The old positioning commands are still in place and work just like they used to, but they now also use the specific dead layers. It is up to the user to make logical choices when placing the detectors using the custom placing commands, since the extension suppressors will not shift radially with the detector. A gui.mac file has been added as well. Place this in whichever folder you build the simulations, and it will run automatically. This file contains some examples for different placement possibilities. Just uncomment the one that you wish to run.