Make a simple wrapper for DRAMMS

- new executable script
- remove .py so slicer will not think it is a scripted module
- prints the xml file when passed the --xml flag
- executes a dummy program wth the passed arguments
- can be added to slicer's path to generate a UI using a path like below:

~/Desktop/Slicer.app/Contents/MacOS/Slicer --additional-module-path ~/slicer4/latest/DRAMMS_in_Slicer/