Made loading octomap_monitor optional in planning_scene_monitor when using WorldGeometryMonitor
Merge pull request #480 from davetcoleman/octomap_monitor_optional

Loading octomap_monitor optional in planning_scene_monitor WorldGeometryMonitor
Python wrapper for getEndEffectorTips()
Added wrapper for new function
Merge branch 'python_get_end_effector_tips' into all_dev_combined