Added + overloads for String and numbers. Closes #510
Added + overloads for String and numbers. Closes #510

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