Merge pull request #3 from ipa-mdl/hydro_dev

Boost.Asio based CAN driver implementation
Merge pull request #1 from ipa320/hydro_dev

update from ipa320
added missing hash function
Merge pull request #2 from ipa-mdl/hydro_dev

updates from ipa-mdl
add urdf for elmo_test_rig
add indicator link
Merge pull request #4 from ipa-fmw/hydro_dev

preparation for vertical integration test
blacklisted unsupported packages
added Chain classes
initial commit of ipa_canopen_chain_ros