[type casting] move explanation about bitshift closer to example code. fixes airbnb#80

Author: hshoff

README.md

@@ -914,7 +914,6 @@
     ```
 
   - Use `parseInt` for Numbers and always with a radix for type casting.
-  - If for whatever reason you are doing something wild and `parseInt` is your bottleneck and need to use Bitshift for [performance reasons](http://jsperf.com/coercion-vs-casting/3), leave a comment explaining why and what you're doing.
 
     ```javascript
     var inputValue = '4';
@@ -936,6 +935,9 @@
 
     // good
     var val = parseInt(inputValue, 10);
+    ```
+
+  - If for whatever reason you are doing something wild and `parseInt` is your bottleneck and need to use Bitshift for [performance reasons](http://jsperf.com/coercion-vs-casting/3), leave a comment explaining why and what you're doing.
 
     // good
     /**