Don't sort values in EnumFieldRenderer.

The dictionaries used to supply enumeration values should be `OrderedDict`
instances if sorting is needed.

tailbone/forms/renderers/common.py

@@ -100,7 +100,7 @@ class EnumFieldRenderer(SelectFieldRenderer):
         return self.enumeration.get(value, unicode(value))
 
     def render(self, **kwargs):
-        opts = [(self.enumeration[x], x) for x in sorted(self.enumeration)]
+        opts = [(self.enumeration[x], x) for x in self.enumeration]
         return SelectFieldRenderer.render(self, opts, **kwargs)