Setup script updates.
Setup script updates.

 - Remove some old comments and screen text.
 - Stop creating unneeded door folder.
 - Clean up mjpg-streamer download
 - Remove notes about

chrisl8/ArloBot,chrisl8/ArloBot,chrisl8/ArloBot,chrisl8/ArloBot,chrisl8/ArloBot,chrisl8/ArloBot