update to use jack's requester.
adds required capabilities information to app msg
merges changes from hydro-devel
Merge pull request #47 from robotics-in-concert/requester

Update to use jack's requester.
Merge branch 'hydro-devel' into capabilities_integration
Merge pull request #48 from robotics-in-concert/capabilities_integration

Adds capabilities support for (r)apps
concert clients topic string.
Added new connection statistics msg. closes #45
added missing constants
reintegrated jihoons resource status debugging services.
update concert client update topics, closes #49
removing requester's priority flag now that individual requests have
priorities.
removed depracated scheduler messages.
working towards the compatibility tree scheduler.