fix(client): use sys.stdout.write for logs

The logs already print out newline characters, so using print()
adds an extra empty line to the log output. Using sys.stdout.write()
removes this empty line.

Author: Matthew Fisher

client/deis.py

@@ -566,7 +566,7 @@ def apps_logs(self, args):
         response = self._dispatch('post',
                                   "/api/apps/{}/logs".format(app))
         if response.status_code == requests.codes.ok:  # @UndefinedVariable
-            print(response.json())
+            sys.stdout.write(response.json())
         else:
             raise ResponseError(response)