added force_depth_write option to RobotLink
Merge branch 'groovy-devel' into robot_api_additions
merge pt. 2
RobotLink: forceDepthWrite/setRenderQueueGroup -> setOnlyRenderDepth
RobotLink: added documentation
robotlink: setting correct render queue groups in setOnlyRenderDepth
robotlink: added getOnlyRenderDepth()
Merge pull request #577 from ros-visualization/robot_api_additions

Robot api additions