feat(ListItem): icon/image prop renderers

src/elements/List/ListItem.js

@@ -1,6 +1,8 @@
 import React, { Component, PropTypes } from 'react'
 import cx from 'classnames'
+
 import META from '../../utils/Meta'
+import { iconPropRenderer, imagePropRenderer } from '../../utils/propUtils'
 
 export default class ListItem extends Component {
   static propTypes = {
@@ -33,11 +35,13 @@ export default class ListItem extends Component {
       _description
     )
 
+    // wrap content for icon/image layouts
+    if (media) content = <div className='content'>{content}</div>
+
     return (
       <div {...rest} className={classes}>
-        {image || icon}
+        {media}
         {content}
-        {children}
       </div>
     )
   }