Refactored usage of HOPAccount and HOPOpenPeerAccount classes
Merge commit '1e87e41b94d6b99a91684e679de5b458e551602a' into feature-20141015-contacts-refactoring

Conflicts:
	Samples/OpenPeerSampleApp/OpenPeerSampleApp/ActiveSessionsViewController.m
	Samples/OpenPeerSampleApp/OpenPeerSampleApp/ContactsManager.m
	Samples/OpenPeerSampleApp/OpenPeerSampleApp/ContactsViewController.m
	Samples/OpenPeerSampleApp/OpenPeerSampleApp/IdentityDelegate.m
	Samples/OpenPeerSampleApp/OpenPeerSampleApp/InfoViewController.m
	Samples/OpenPeerSampleApp/OpenPeerSampleApp/LoginManager.m
	Samples/OpenPeerSampleApp/OpenPeerSampleApp/Settings.m
	openpeer-ios-sdk.xcodeproj/project.pbxproj
Second phase of HOPAccount class refactoring
Fixed some crashes
First stage of replacing HOPContact class with HOPRoldoexContact.
Second phase contacts refactoring
Fixed some UI issues and added support for group chat push notifications.