Added solo robot

solo_description/meshes/sphere.obj

solo_description/meshes/stl/with_foot/solo_body.stl

solo_description/meshes/stl/with_foot/solo_foot.stl

...ription/meshes/stl/with_foot/solo_lower_leg_left_side.stl

...iption/meshes/stl/with_foot/solo_lower_leg_right_side.stl

...ription/meshes/stl/with_foot/solo_upper_leg_left_side.stl

...iption/meshes/stl/with_foot/solo_upper_leg_right_side.stl

solo_description/meshes/stl/without_foot/solo_body.stl

...tion/meshes/stl/without_foot/solo_lower_leg_left_side.stl

...ion/meshes/stl/without_foot/solo_lower_leg_right_side.stl

...tion/meshes/stl/without_foot/solo_upper_leg_left_side.stl

...ion/meshes/stl/without_foot/solo_upper_leg_right_side.stl

solo_description/robots/solo.urdf

solo_description/robots/solo12.urdf

solo_description/srdf/solo.srdf