Merge pull request loris-imageserver#507 from loris-imageserver/trans…

…forms

transforms: capture stdout output as well as stderr

loris/transforms.py

@@ -272,7 +272,7 @@ def _create_fifo(self, tmp):
     def _run_transform(self, target_fp, image_request, image_info, transform_cmd, fifo_fp):
         try:
             expand_proc = subprocess.Popen(transform_cmd, shell=True, bufsize=-1,
-                stderr=subprocess.PIPE, env=self.env)
+                stdout=subprocess.PIPE, stderr=subprocess.PIPE, env=self.env)
             with open(fifo_fp, 'rb') as f:
                 # read from the named pipe
                 p = Parser()