Fixed saving logger level issue.
Improved handling connectivity issues. https://github.com/openpeer/opios/issues/272
Added Reachibility and OfflineMessanger, classes for handling conection status changes.
Updated headers
Improved backgrounding and APNS logs.
Push notification is sent using NSURLSession
Renamed misleading name of the method for starting std output.
Enabled sending push notification when app goes to background. Sending messages that were tried to sent while account wasn't in ready state.
Removed unused classes. Optimised method for placing a call. Updated comments.
Renamed typedef enums. Type names changed from plural to singular.
Added change to retry settings download in case of timeout.
Merge branch '20140401-dev-stable' into 20140401-SDK-update
updated change log
- merged proper fix for dev-stable stack
Merge branch '20140401-dev-stable' into 20140401-SDK-update

Conflicts:
	libs/op
Renamed logo images. Hookflash developer id is not appent to user agent if it is empty.
Updated logs for sending push notification.
Merge commit '04320d50a8c96be38f5b5d788da3ed59bc2e7bec' into feature-20140505-no-connection-fix

Conflicts:
	Samples/OpenPeerSampleApp/OpenPeerSampleApp.xcodeproj/project.pbxproj
	Samples/OpenPeerSampleApp/OpenPeerSampleApp/LoginManager.m
	Samples/OpenPeerSampleApp/OpenPeerSampleApp/MessageManager.m
	Samples/OpenPeerSampleApp/OpenPeerSampleApp/OpenPeer.m
	Samples/OpenPeerSampleApp/OpenPeerSampleApp/SessionManager.m
	openpeer-ios-sdk/source/HOPCall.mm

Fixed error when messages are not delivered after return from background.
Merge branch '20140401-dev-stable' into feature-20140505-no-connection-fix

Conflicts:
	Samples/OpenPeerSampleApp/OpenPeerSampleApp/APNSManager.m
	libs/op
Fixed bugs after latest merge. Code cleanup.
Fixed build error for OpenPeerSampleApp target.