update changelogs
0.5.3
Merge pull request #12 from ipa320/hydro_dev

updates from ipa320
Update package.xml
Merge pull request #135 from ipa320/hydro_release_candidate

bring back changes from Hydro release candidate
Update package.xml
move cob_hokuyo and cob_hwboard to cob_bringup_sandbox
Update package.xml
Update package.xml
Update package.xml
Merge pull request #136 from ipa-fmw/hydro_dev

change maintainer and add missing dependency