Finish implementation of the types module

Note that many classes will need special handling in the typing module.

builtins/2.7/__builtin__.pyi

@@ -806,3 +806,5 @@ def eval(s: str) -> Any: ...
 def cmp(x: Any, y: Any) -> int: ...
 
 def execfile(filename: str, globals: Dict[str, Any] = None, locals: Dict[str, Any] = None) -> None: ...
+
+class file(BinaryIO): ...