Merge pull request #29 from raphdg/fix_shlex

Fixed python26 shlex split of unicode strings.

docker/client.py

@@ -101,7 +101,7 @@ class Client(requests.Session):
         detach=False, stdin_open=False, tty=False, mem_limit=0, ports=None,
         environment=None, dns=None, volumes=None, volumes_from=None):
         if isinstance(command, six.string_types):
-            command = shlex.split(command)
+            command = shlex.split(str(command))
         return {
             'Hostname':     hostname,
             'PortSpecs':    ports,