Move 2.7 to 2 (#635)

Closes #579.

stdlib/2/Queue.pyi

@@ -0,0 +1,29 @@
+# Stubs for Queue (Python 2)
+
+from typing import Any, TypeVar, Generic
+
+_T = TypeVar('_T')
+
+class Empty(Exception): ...
+class Full(Exception): ...
+
+class Queue(Generic[_T]):
+    maxsize = ... # type: Any
+    mutex = ... # type: Any
+    not_empty = ... # type: Any
+    not_full = ... # type: Any
+    all_tasks_done = ... # type: Any
+    unfinished_tasks = ... # type: Any
+    def __init__(self, maxsize: int = ...) -> None: ...
+    def task_done(self) -> None: ...
+    def join(self) -> None: ...
+    def qsize(self) -> int: ...
+    def empty(self) -> bool: ...
+    def full(self) -> bool: ...
+    def put(self, item: _T, block: bool = ..., timeout: float = ...) -> None: ...
+    def put_nowait(self, item: _T) -> None: ...
+    def get(self, block: bool = ..., timeout: float = ...) -> _T: ...
+    def get_nowait(self) -> _T: ...
+
+class PriorityQueue(Queue): ...
+class LifoQueue(Queue): ...