Update react.js cheatsheet.

assets/style.css

@@ -137,7 +137,7 @@ pre {
 }
 
 .pages a {
-  font-weight: bold;
+  font-weight: 400;
   display: block;
   padding: 15px 15px 15px 0;
   border-top: solid 1px rgba(0, 0, 0, 0.05);

react.md

@@ -102,8 +102,7 @@ layout: default
       }
     })
 
-### Two-way binding
-
+### [Two-way binding](http://facebook.github.io/react/docs/two-way-binding-helpers.html)
 
     React.createClass({
       mixins: [React.addons.LinkedStateMixin],
@@ -117,8 +116,6 @@ layout: default
     // LinkedStateMixin adds a method to your React component called
     // linkState(). 
 
-http://facebook.github.io/react/docs/two-way-binding-helpers.html
-
 ### Lists
 
     var TodoList = React.createClass({
@@ -154,6 +151,7 @@ http://facebook.github.io/react/docs/two-way-binding-helpers.html
     });
 
 ### Mixins
+
     var TickTock = React.createClass({
       mixins: [SetIntervalMixin]
     }
@@ -162,8 +160,6 @@ http://facebook.github.io/react/docs/two-way-binding-helpers.html
       componentWillMount: function() { .. }
     }
 
-### Reusable components
-
-http://facebook.github.io/react/docs/reusable-components.html
+### [Reusable components](http://facebook.github.io/react/docs/reusable-components.html)
 
   * Prop validation