Forgot to pull before committing

Updated the installation scripts and wiki to reflect the new location of the dfall-system repository

VERSION NUMBER UPDATE: to reflect the upgrade to be compatible with ROS melodic. And the change of naming convention from teacher to (dfall)master

Ros melodic upgrade and changed naming from teacher to master

See merge request D-FaLL/PandS-System/D-FaLL-System!14

Changed the necessary occurances of references to teacher in to the wiki documentation to correctlu refer to master, dfallmaster, or System Config GUI

Purged the code of all occurances of the terminology teacher. This was replaced by either master or by System Config GUI

Adjusted installation script so that it add comments to the .bashrc file and to add a change directory allias

Tested to be working with a network of 1 teacher, 1 student laptop, 1 raspberry pi, and 1 student GUI laptop. Added line to Config.sh for how to run as a teacher (aka dfallmaster), and adjust Radio Emulator to wrap back around for command above 65535

Added Mocap Emulator and complete the Quadcopter Simulator class. Tested and working on a single laptop. Next step to test on a network of laptops

Updated install scripts for the new ROS packages key. Also added partial install script to make Rasp Pi installation easier