Add bits and pieces to the Slying Agent client for checking availability and...

Add bits and pieces to the Slying Agent client for checking availability and occulsion of mocap data. Needs compiling and teesting

dfall_ws/src/dfall_pkg/launch/Config.sh

 # TO RUN THE SYSTEM FULLY ON THE LOCAL COMPUTER:
-# export ROS_MASTER_URI=http://localhost:11311
+export ROS_MASTER_URI=http://localhost:11311
 # TO RUN THE SYSTEM ON A DEFAULT CONFIGURATION OF THE NETWROK:
-export ROS_MASTER_URI=http://teacher:11311
+#export ROS_MASTER_URI=http://teacher:11311
 # OTHER NECESSARY ENVIRONMENT VARIABLES:
 export ROS_IP=$(hostname -I | awk '{print $1;}')
 export DFALL_DEFAULT_AGENT_ID=$(cat /etc/dfall_default_agent_id)