- long lasting calls on MediaEngine avoided
https://github.com/openpeer/opios/issues/338
Update to android makefiles.
https://github.com/openpeer/opandroid/issues/535
- fix: system message callee constructor was missing callee
Merge remote-tracking branch 'origin/20140401-dev-stable' into feature-20140730-is-composing

Conflicts:
	libs/op-core-cpp
Merge remote-tracking branch 'origin/feature-20140730-is-composing' into feature-20140521-push-messaging

Conflicts:
	libs/op-core-cpp