Merge pull request #46 from thiagodefreitas/hydro_dev

fixes ipa320/ipa_canopen#45
Merge pull request #52 from thiagodefreitas/multiple_chains_simpler

This enables support for multiple chains
Merge pull request #53 from thiagodefreitas/multiple_chains_simpler

Fixes tools for the multiple chains ipa_canopen version
Adds some diagnostics
Merge pull request #58 from thiagodefreitas/hydro_dev

Changes the behaviour when a node can not be found