Add unix domain socket support for the RPCClient.

examples/sum_client_unix_socket.py

@@ -0,0 +1,6 @@
+# -*- coding: utf-8 -*-
+
+from mprpc import RPCClient
+
+client = RPCClient(unix_socket_path='/tmp/rpc.sock')
+print client.call('sum', 1, 2)

examples/sum_server_unix_socket.py

@@ -0,0 +1,26 @@
+# -*- coding: utf-8 -*-
+
+import os
+
+from gevent import socket
+from gevent.server import StreamServer
+
+from mprpc import RPCServer
+
+
+class SumServer(RPCServer):
+    def sum(self, x, y):
+        return x + y
+
+
+def bind(sockname='/tmp/rpc.sock'):
+    listener = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
+    if os.path.exists(sockname):
+        os.remove(sockname)
+    listener.bind(sockname)
+    listener.listen(1)
+    return listener
+
+
+server = StreamServer(bind(), SumServer())
+server.serve_forever()