removing extra .js suffix from required files and physically separating

nodebb libs from deps

src/topics.js

@@ -1,16 +1,17 @@
-var RDB = require('./redis.js'),
+var RDB = require('./redis'),
-	posts = require('./posts.js'),
+	posts = require('./posts'),
-	utils = require('./../public/src/utils.js'),
+	utils = require('./../public/src/utils'),
-	user = require('./user.js'),
+	user = require('./user'),
-	categories = require('./categories.js'),
+	Groups = require('./groups')
-	posts = require('./posts.js'),
+	categories = require('./categories'),
-	threadTools = require('./threadTools.js'),
+	posts = require('./posts'),
+	threadTools = require('./threadTools'),
 	postTools = require('./postTools'),
 	notifications = require('./notifications'),
 	async = require('async'),
-	feed = require('./feed.js'),
+	feed = require('./feed'),
-	favourites = require('./favourites.js'),
+	favourites = require('./favourites'),
-	meta = require('./meta.js'),
+	meta = require('./meta'),
 	reds = require('reds'),
 	topicSearch = reds.createSearch('nodebbtopicsearch'),
 	nconf = require('nconf'),