new layout and 3D controls in basic_controls
adds 6-DOF controls to one of the 3D controls
makes 3D+6-DOF control NOT fixed
Merge pull request #7 from aleeper/move_rotate_3d

new layout and 3D controls in basic_controls
0.7.6
Merge branch 'groovy-devel' of github.com:ros-visualization/visualization_tutorials into groovy-devel