added another level
added ghost and Test behavior
handled death
handled full death
added timer for frighted mode
added Init method to ViewModels
changed IGame interface: IsLost changed on IsFinished,
LoadNextLevel become public and is not invoked implicitly

changed game finishing handling in GameController
fixed timers
added disposing of level, field, pacman and ghosts
fixed next level starting
fixed notifications

TODO: fix bug when old level covers fresh level