message: Improve variance_scaling_initializer description
  * Improve variance_scaling_initializer description
  Added mention of the "MSRA initializer" atlas
diff: @@ -79,7 +79,8 @@ def variance_scaling_initializer(factor=2.0, mode='FAN_IN', uniform=False,
  ```
  * To get [Delving Deep into Rectifiers](
  - http://arxiv.org/pdf/1502.01852v1.pdf), use (Default):<br/>
  + http://arxiv.org/pdf/1502.01852v1.pdf) (also know as the "MSRA
  + initialization"), use (Default):<br/>
  `factor=2.0 mode='FAN_IN' uniform=False`
  * To get [Convolutional Architecture for Fast Feature Embedding](
  http://arxiv.org/abs/1408.5093), use:<br/>
  