Removes Blockmania reference from the README.
Removes Blockmania reference from the README.

mertserezli/Terasology,MarcinSc/Terasology,samuto/Terasology,MarcinSc/Terasology,neshume/Terasology,Vizaxo/Terasology,flo/Terasology,frankpunx/Terasology,sceptross/Terasology,Felges/Terasology,Nanoware/Terasology,immortius/Terasology,DPirate/Terasology,frankpunx/Terasology,Ciclop/Terasology,dimamo5/Terasology,mertserezli/Terasology,Josharias/Terasology,dimamo5/Terasology,dannyzhou98/Terasology,Vizaxo/Terasology,Felges/Terasology,leelib/Terasology,indianajohn/Terasology,Josharias/Terasology,kartikey0303/Terasology,Halamix2/Terasology,samuto/Terasology,Ciclop/Terasology,AWildBeard/Terasology,Halamix2/Terasology,MovingBlocks/Terasology,immortius/Terasology,CC4401-TeraCity/TeraCity,AWildBeard/Terasology,MovingBlocks/Terasology,kaen/Terasology,Nanoware/Terasology,sceptross/Terasology,jacklotusho/Terasology,indianajohn/Terasology,jacklotusho/Terasology,Malanius/Terasology,flo/Terasology,kaen/Terasology,neshume/Terasology,Nanoware/Terasology,CC4401-TeraCity/TeraCity,kartikey0303/Terasology,Malanius/Terasology,DPirate/Terasology,leelib/Terasology,MovingBlocks/Terasology,dannyzhou98/Terasology