Update Queue.swift
Update Queue.swift

Not necessary to pull in full Foundation, Dispatch is just fine.
morizotter/BrightFutures,zhaar/BrightFutures,hoanganh6491/BrightFutures,hoanganh6491/BrightFutures,MattesGroeger/BrightFutures,Noobish1/BrightFutures,zhaar/BrightFutures,Thomvis/BrightFutures,zenkimoto/BrightFutures,zenkimoto/BrightFutures,morizotter/BrightFutures,Thomvis/BrightFutures,MattesGroeger/BrightFutures,tranhieutt/BrightFutures,Noobish1/BrightFutures,tranhieutt/BrightFutures