Shouldn't be able to instantiate abstract classes. Closes #18
Shouldn't be able to instantiate abstract classes. Closes #18

marcusnaslund/rock,jonathanudd/rock,ds84182/rock,fredrikbryntesson/rock,fasterthanlime/rock,magic-lang/rock,magic-lang/rock,kirbyfan64/rock,marcusnaslund/rock,zhaihj/rock,ds84182/rock,zhaihj/rock,cogneco/rock,jonathanudd/rock,shamanas/rock,davidhesselbom/rock,ooc-lang/rock,cogneco/rock,thomasfanell/rock,thomasfanell/rock,ooc-lang/rock,shamanas/rock,fredrikbryntesson/rock,kirbyfan64/rock,davidhesselbom/rock,fasterthanlime/rock