Updated ros-pkg for RTAB-Map 0.8.0

Moved all nodelets and rviz plugins in "rtabmap_ros" namespace instead of "rtabmap"
Refactored rtabmap_ros messages (added convenient conversion methods in rtabmap_ros/MsgConversion.h)
Added noise filtering parameters for map_assembler node
Added variance parameter for map_optimizer node
Odometry nodes publish covariance matrices in odometry messages. Publish rtambap_ros::OdomInfo topic too.

src/rviz/MapGraphDisplay.h

@@ -26,8 +26,8 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
 
-#ifndef RVIZ_PATH_DISPLAY_H
-#define RVIZ_PATH_DISPLAY_H
+#ifndef MAP_GRAPH_DISPLAY_H
+#define MAP_GRAPH_DISPLAY_H
 
 #include <rtabmap_ros/MapData.h>
 
@@ -46,7 +46,7 @@ class FloatProperty;
 
 using namespace rviz;
 
-namespace rtabmap
+namespace rtabmap_ros
 {
 
 /**
@@ -79,7 +79,7 @@ private:
   FloatProperty* alpha_property_;
 };
 
-} // namespace rviz
+} // namespace rtabmap_ros
 
-#endif /* RVIZ_PATH_DISPLAY_H */
+#endif /* MAP_GRAPH_DISPLAY_H */