updates for latest gazebo under hydro
Merge branch 'hydro-update-urdfs' into hydro-update-fixurgazebo
Merge branch 'hydro-update-urdfs' into hydro-update-fixurgazebo
adapt launch files in order to be able to use normal/limited xacro
Merge branch 'hydro-update-urdfs' into hydro-update-fixurgazebo
changes due to file renaming
Merge pull request #44 from ipa-fxm/hydro-update-fixurgazebo

Fix universal simulation in gazebo