added Scripts from IronLanguages 8a1de8b7a1086ccfad5b65960d3d29fd55d7adb6
adjusted to work with external ipy interpreter
added right arrow token
Merge pull request #39 from paweljasinski/scripts

Scripts
renamed module __builtin__ to builtins
Merge pull request #43 from paweljasinski/i40

renamed module __builtin__ to builtins