URBNG-141 - [WP] "New task available" notification
URBNG-143 - [WP] Mark changed game as provided in UX spec
URBNG-143 - [WP] Mark changes in game as provided in UX spec

Also:
* fixed data in GameWebServiceMock
* auto generating id in ABCDPossibleAnswer
* fixed game icons in mock
* fixed data comparing in GameChangesManager