update changelogs
"0.5.2"
Merge branch 'hydro_dev' into hydro_release_candidate
Merge branch 'hydro_dev' into hydro_release_candidate
update changelogs
"0.5.3"
Merge branch 'hydro_dev' into hydro_release_candidate
update changelog
0.5.4
Merge branch 'hydro_dev' of github.com:ipa-nhg/schunk_modular_robotics into hydro_dev
Merge branch 'hydro_dev' of github.com:ipa320/schunk_modular_robotics into hydro_dev
Merge pull request #81 from ipa320/hydro_release_candidate

bring back changes from Hydro release candidate
beautify mesh files
Merge pull request #84 from ipa-nhg/collada_mesh

Collada mesh