Beta v0.8 released

Beta v0.8 brings a lot of changes focused mostly on the multiplayer part of the game. It is now possible to play games with more than two players (up to 63 in theory, but more than 10 players are not recommended for now). In addition to that the game supports dedicated servers now (Windows&Linux). Due to all these changes, the way a multiplayer game is setup has also changed completely; players enter a game lobby now before playing a song, where the lobby leader has to select the song, difficulty and mode for each game.