Make create-react-class a runtime dependency and use latest version of react-transition-group

assets/js/components/Alert.jsx

@@ -4,11 +4,6 @@ var classNames = require('classnames');
 
 var Alert = reactCreateClass({
 
-    propTypes: {
-        type: React.PropTypes.string.isRequired,
-        text: React.PropTypes.string.isRequired
-    },
-
     render: function() {
         return(
             <div className={classNames('alert', 'alert-' + this.props.type)}>{this.props.text}</div>

assets/js/components/Options.jsx

@@ -2,7 +2,7 @@
 
 var React = require('react');
 var reactCreateClass = require('create-react-class');
-var ReactCSSTransitionGroup = require('react-addons-css-transition-group');
+var ReactCSSTransitionGroup = require('react-transition-group/CSSTransitionGroup');
 
 var config = require('../config');