Fix #637 by adding back an implementation of BlockClosure>>newProcess
Fix #637 by adding back an implementation of BlockClosure>>newProcess

shoshanatech/Dolphin,jgfoster/Dolphin,shoshanatech/Dolphin,dolphinsmalltalk/Dolphin,dolphinsmalltalk/Dolphin,dolphinsmalltalk/Dolphin,objectarts/Dolphin,jgfoster/Dolphin,objectarts/Dolphin,shoshanatech/Dolphin,dolphinsmalltalk/Dolphin,jgfoster/Dolphin,jgfoster/Dolphin,shoshanatech/Dolphin