Merge pull request #85 from ipa-fxm/indigo_dev

Indigo dev
Merge pull request #86 from ipa-fxm/indigo_dev

cleaning up
materials should not be loaded in the components urdf
wrong lenght
pg70 collada model
origin for collision model is in the center of the box
Merge pull request #1 from ipa320/hydro_dev

update
mesh for shoulder added
Merge https://github.com/ipa-tif/schunk_modular_robotics into cob4_shoulder
Renamed links and added shoulder model
modifications in tranmissions, removing of bumpers and small cleanups
Merge pull request #89 from ipa-tif/hydro_dev

mesh shoulder
Merge pull request #90 from ipa-nhg/cob4_shoulder

Cob4 shoulder
Merge branch 'hydro_dev' of github.com:ipa320/schunk_modular_robotics into indigo_dev