add drcsim to workspace setup script

Tools/ros/px4_workspace_setup.sh

@@ -18,12 +18,17 @@ cd ..
 # mav comm
 git clone https://github.com/PX4/mav_comm.git
 
-# glog catkin 
+# glog catkin
 git clone https://github.com/ethz-asl/glog_catkin.git
 
 # catkin simple
 git clone https://github.com/catkin/catkin_simple.git
 
+# drcsim (for scenery and models)
+hg clone https://bitbucket.org/osrf/osrf-common
+hg clone https://bitbucket.org/osrf/sandia-hand
+hg clone https://bitbucket.org/osrf/drcsim
+
 cd ..
 
 catkin_make