Corrected the variable name mis-match for the FAQ about getting data from Vicon. Replace (almost) all instances of custom controller with student controller

Added latex file for a getting started cheat sheet, i.e., with basic paths, git commands, and launch commands

Adjusted the setup page on the wiki to give more details about flashing new firmware onto the Crazyflie

Moved CF firmware build success pic from the wiki folder to the firmware folder where the readme files that needs this pic is