added first summit_xl_multi.launch
summit_xl_gazebo. Fixed sintaxis error in summit_xl_multi.launch
Updated launch files and gazebo files
Fixed more files
summit_xl.urdf.xacro. Fixed wheel positions to fix movement
Fixed omni movement
Added tf_prefix to urdf links
Now it uses a tf_prefix for the odom->base_footprint transform
Delete debugging displays
Allows multiple simulations of summit xl (not omni wheels yet)
Minor fix
Fixed ptz controller error
Added missing hokuyo hq model
Merge pull request #1 from JorgeArino/master

Allow multiple simulations
summit_xl_2dnav: Adding launch files for purepursuit planner
Merge pull request #2 from RobotnikAutomation/master

summit_xl_2dnav: Adding launch files for purepursuit planner
summit_xl_description: updating hq gazebo model to correct an error in the sensors' tf root
summit_xl_2dnav: Updating gmapping launch to set the params odom and base frame
Merge branch 'hydro-devel' of https://github.com/RobotnikAutomation/summit_xl_sim into hydro-devel
Fixes some errors with the gazebo models