JSON backend: Added preliminary versions support
JSON backend: Added preliminary versions support

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