add OGRE-Paging as dependency since gazebo is doing paging.
switch from OGRE-Paging to OGRE-Terrain per pull request comment
Merge pull request #110 from hsu/groovy-devel-gazebo-paging-support

Groovy devel gazebo paging support
Use the new renderingiface
Move to polling loop for service clients to avoid deadlock from SIGINT delivered during startup.
Merge pull request #147 from ros-simulation/shutdown_cleanup

Move to polling loop for service clients to avoid deadlock from SIGINT d...