[resources] add tools section, include JSHint & JSCS

Author: hshoff

README.md

@@ -1428,6 +1428,13 @@
 
   - [Annotated ECMAScript 5.1](http://es5.github.com/)
 
+**Tools**
+
+  - [JSHint](http://www.jshint.com/)
+    + [Airbnb Style .jshintrc](https://github.com/airbnb/javascript/blob/master/linters/jshintrc)
+  - [JSCS](https://github.com/jscs-dev/node-jscs) - a code style checker
+    + [Airbnb Style Preset](https://github.com/jscs-dev/node-jscs/blob/master/presets/airbnb.json)
+
 **Other Styleguides**
 
   - [Google JavaScript Style Guide](http://google-styleguide.googlecode.com/svn/trunk/javascriptguide.xml)