Updated code tab of web interface so that files can not be uploaded asynchronously and placed in the correct location

Added hint to update web interface shell script for how to add write access to the group for all files in the /var/www/html folder

Web interface now working for launching both the master and agent. VERY IMPORTANT is the command added to the web interface install script that the www-data user must be added to the plugdev group so that nodes launched by the web interface have permission to access the CrazyRadio USB dongle

Added first attempt at a web interface. This was used for the IFAC video, but needs more work to be used of the home version of the pands