Add Py2 BaseHTTPServer (#397)

Fixes #395

stdlib/2.7/BaseHTTPServer.pyi

@@ -0,0 +1,47 @@
+# Stubs for BaseHTTPServer (Python 2.7)
+
+from typing import Any, BinaryIO, Mapping, Optional, Tuple, Union
+import SocketServer
+import mimetools
+
+class HTTPServer(SocketServer.TCPServer):
+    server_name = ...  # type: str
+    server_port = ...  # type: int
+    def __init__(self, server_address: Tuple[str, int],
+                 RequestHandlerClass: type) -> None: ...
+
+class BaseHTTPRequestHandler:
+    client_address = ...  # type: Tuple[str, int]
+    server = ...  # type: SocketServer.BaseServer
+    close_connection = ...  # type: bool
+    command = ...  # type: str
+    path = ...  # type: str
+    request_version = ...  # type: str
+    headers = ...  # type: mimetools.Message
+    rfile = ...  # type: BinaryIO
+    wfile = ...  # type: BinaryIO
+    server_version = ...  # type: str
+    sys_version = ...  # type: str
+    error_message_format = ...  # type: str
+    error_content_type = ...  # type: str
+    protocol_version = ...  # type: str
+    MessageClass = ...  # type: type
+    responses = ...  # type: Mapping[int, Tuple[str, str]]
+    def __init__(self, request: bytes, client_address: Tuple[str, int],
+                 server: SocketServer.BaseServer) -> None: ...
+    def handle(self) -> None: ...
+    def handle_one_request(self) -> None: ...
+    def send_error(self, code: int, message: Optional[str] = ...) -> None: ...
+    def send_response(self, code: int,
+                      message: Optional[str] = ...) -> None: ...
+    def send_header(self, keyword: str, value: str) -> None: ...
+    def end_headers(self) -> None: ...
+    def flush_headers(self) -> None: ...
+    def log_request(self, code: Union[int, str] = ...,
+                    size: Union[int, str] = ...) -> None: ...
+    def log_error(self, format: str, *args: Any) -> None: ...
+    def log_message(self, format: str, *args: Any) -> None: ...
+    def version_string(self) -> str: ...
+    def date_time_string(self, timestamp: Optional[int] = ...) -> str: ...
+    def log_date_time_string(self) -> str: ...
+    def address_string(self) -> str: ...