add changelogs
0.5.1
Merge branch 'hydro_dev' into hydro_release_candidate
Merge branch 'hydro_dev' into hydro_release_candidate
Merge pull request #41 from ipa-fxm/hydro_dev

Hydro dev
Merge pull request #42 from ipa320/hydro_release_candidate

Hydro release candidate
Merge pull request #43 from ipa320/hydro_dev

bringin updates from hydro_dev