- Host / slave conversation needs to subscribe to backgrounding
https://github.com/openpeer/op-core-cpp/issues/5
- Host / slave conversation need to push upon backgrounding
https://github.com/openpeer/op-core-cpp/issues/6

- Each backgrounding subscriber should use a setting for attached phase
https://github.com/openpeer/op/issues/70
- fix: bug which would not clear off notifier when backgrounding was ready
https://github.com/openpeer/op/issues/73
- wrap all of services::backgrounding in core layer
https://github.com/openpeer/op-core-cpp/issues/12
Merge branch '20140307-dev-stable' into feature-20140314-push-before-backgrounding

* 20140307-dev-stable:
  - fix: moved final outside candidates beside ICE tags https://github.com/openpeer/op-core-cpp/issues/17
  - added ICE final flag for media https://github.com/openpeer/op-core-cpp/issues/17
  - fix: updated call log levels to more appropriate values https://github.com/openpeer/op-core-cpp/issues/17
  - fix: wasn't remembering candidate version once fetched https://github.com/openpeer/op-core-cpp/issues/17
  - Allow selection of subsystem in logging to debugging life easier when dealing with media https://github.com/openpeer/op/issues/78
  - fix: Don't wait for ICE to be ready for media https://github.com/openpeer/op-core-cpp/issues/8
- missed interaction subscription method "subscribe"
https://github.com/openpeer/op/issues/73
- notification that application will quit and blocking until thread shutdown is processed
https://github.com/openpeer/op-services-cpp/issues/34