more fixes to ros-visualization#1275

- invalid quaternion: issue warning only
- triangle list accepts points.size()/3 colors as well (face colors)
- don't create text marker for interactive marker control with empty description
- allow more fine-grained log levels
  - distinguish all ros::console::levels
  - issue rviz status warning for any message, but avoid cluttering the console
  - use logger namespace to allow disabling console output

src/rviz/default_plugin/interactive_markers/interactive_marker.cpp

@@ -195,7 +195,8 @@ bool InteractiveMarker::processMessage( const visualization_msgs::InteractiveMar
     boost::make_shared<InteractiveMarkerControl>( context_,
                                                   reference_node_, this );
 
-  description_control_->processMessage( interactive_markers::makeTitle( message ));
+  if (!message.description.empty())
+    description_control_->processMessage( interactive_markers::makeTitle( message ));
 
   //create menu
   menu_entries_.clear();