robfig/revel — pull request #429 by lidaobing (2013-12-29 09:25:29+00:00)
Title: #428: improve error information when render failed

from the current error log(as follows), I can't tell which function failed when I only got a `Method Index`, how about change this to Action

```
ERROR 2013/12/29 14:21:36 controller.go:95: No RenderArg names found for Render call on line 222 (Method Index )
```