 *added extension to urdf mesh filename in robot visual tag; <mesh filename="*.stlb"/>  *added <map> for gazebo collision mesh  *update urdf2gazebo parser to deal with the changes  *update rviz urdf .mesh extraction to deal with the changes
 *added extension to urdf mesh filename in robot visual tag; <mesh filename="*.stlb"/>
 *added <map> for gazebo collision mesh
 *update urdf2gazebo parser to deal with the changes
 *update rviz urdf .mesh extraction to deal with the changes


git-svn-id: d2efb97080a7ec9e0d4263f6a2967bdc2a41cbe9@18892 eb33c2ac-9c88-4c90-87e0-44a10359b0c3

ros-visualization/rviz,ros-visualization/rviz,ros-visualization/rviz,ros-visualization/rviz,ros-visualization/rviz