Merge pull request #137 from ipa-bnm/feature/voltagectrl_newphidget

Feature/voltagectrl newphidget
use SetFloat service from cob_srvs
Merge pull request #138 from ipa-fmw/hydro_dev

use SetFloat service from cob_srvs
fix install tags
Merge pull request #139 from ipa-fmw/fix/base_install_tags

fix install tags
Merge branch 'hydro_dev' of github.com:ipa320/cob_driver into hydro_dev