fix for catkin_make_isolated
Merge pull request #155 from ipa-nhg/hydro_dev

install tags
add changelog
0.5.1
catkin_lint
add cob4-1 to robotlist
remove cob_hardware_test
missing install tags and test file
Merge pull request #156 from ipa-fxm/hydro_dev

catkin_lint and install tags
merge
Merge pull request #157 from ipa320/hydro_release_candidate

Hydro release candidate