improve license info

Author: yyx990803

src/core/vdom/patch.js

@@ -1,8 +1,13 @@
 /**
- * Virtual DOM implementation based on Snabbdom by
+ * Virtual DOM patching algorithm based on Snabbdom by
  * Simon Friis Vindum (@paldepind)
- * with custom modifications.
+ * Licensed under the MIT License
+ * https://github.com/paldepind/snabbdom/blob/master/LICENSE
  *
+ * modified by Evan You (@yyx990803)
+ *
+
+/*
  * Not type-checking this because this file is perf-critical and the cost
  * of making flow understand it is not worth it.
  */

src/server/render-stream.js

@@ -1,13 +1,16 @@
 /* @flow */
 
-import stream from 'stream'
-import { createWriteFunction } from './write'
-
 /**
  * Original RenderStream implmentation by Sasha Aickin (@aickin)
  * Licensed under the Apache License, Version 2.0
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
  * Modified by Evan You (@yyx990803)
  */
+
+import stream from 'stream'
+import { createWriteFunction } from './write'
+
 export default class RenderStream extends stream.Readable {
   buffer: string;
   render: Function;