Added getTeamNo() to Event
refactoring: replaced setDeviceAlias() with openNextPage(boolean) in LobbyActivity
Fixed format
Refactored PPSManager to PpsManager (same with factory)
Minor refactoring
Changed implementation for checking if the new user exists in cases 'USER_JOIN_PUBLIC/PRIVATE'
Refactored all classes/variables' 'API' names to 'Api'
Made the factory private
Major refactor: moved isPersonal variable from SessionManager to PpsManager
Major refactor: moved private/public/team lists from SessionManager to PpsManager