split wormhole_server step 1: move files

setup.py

@@ -16,10 +16,12 @@ setup(name="magic-wormhole",
       packages=["wormhole",
                 "wormhole.blocking", "wormhole.twisted",
                 "wormhole.scripts", "wormhole.test", "wormhole.util",
-                "wormhole.servers"],
+                "wormhole_server"],
       package_data={"wormhole": ["db-schemas/*.sql"]},
       entry_points={"console_scripts":
-                    ["wormhole = wormhole.scripts.runner:entry"]},
+                    ["wormhole = wormhole.scripts.runner:entry",
+                     "wormhole-server = wormhole_server.runner:entry",
+                     ]},
       install_requires=["spake2==0.3", "pynacl", "requests", "argparse",
                         "six", "twisted >= 16.1.0"],
       extras_require={"tor": ["txtorcon", "ipaddr"]},