closes #1556

added tag input box to composer when creating a topic
added new routes for viewing tags 'tags' and 'tags/:tagname'
respectively
post_bar.tpl shows the tags of the topic
can edit the main post to remove or add new tags
added a new menu item to header to go to the tags page

src/postTools.js

@@ -61,6 +61,8 @@ var winston = require('winston'),
 
 							topics.setTopicField(tid, 'thumb', options.topic_thumb);
 
+							topics.updateTags(tid, options.tags);
+
 							plugins.fireHook('action:topic.edit', tid);
 						}