Move strict-binding-parser to lib/mixins

Author: TimvdLippe

lib/utils/strict-binding-parser.html lib/mixins/strict-binding-parser.htmllib/utils/strict-binding-parser.html renamed to lib/mixins/strict-binding-parser.html

@@ -7,7 +7,7 @@
 Code distributed by Google as part of the polymer project is also
 subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
 -->
-<link rel="import" href="../../lib/utils/strict-binding-parser.html">
+<link rel="import" href="../../lib/mixins/strict-binding-parser.html">
 <dom-module id="x-basic">
   <template>
     <div id="boundChild"