Rename from SpieleArena to Scolastico

After a long reflection, it is time. We have renamed ourselves! From now on we are no longer called SpieleArena but scolastico. This has several backgrounds such as: to make a better international impression since SpieleArena is a German word and means something like “GamesArena”. Apart from that, our new name is directly linked to our new domain: scolasti.co. Do not hesitate to praise and criticism in the comments there!