Don't generate unnecessary JS files.

Also exclude jquery.highlight from the nosearch version, as it's not needed there.

source/javascripts/all.js

-//= require_tree ./lib
-//= require_tree ./app
+//= require ./lib/_energize
+//= require ./app/_lang
+//= require ./app/_search
+//= require ./app/_toc

source/javascripts/all_nosearch.js

-//= require_tree ./lib
-//= require_tree ./app
-//= stub ./app/search.js
-//= stub ./lib/lunr.js
+//= require ./lib/_energize
+//= require ./app/_lang
+//= require ./app/_toc

source/javascripts/app/search.js → source/javascripts/app/_search.js

+//= require ../lib/_lunr
+//= require ../lib/_jquery.highlight
 (function (global) {
   'use strict';
 

source/javascripts/app/toc.js → source/javascripts/app/_toc.js

+//= require ../lib/_jquery_ui
+//= require ../lib/_jquery.tocify
 (function (global) {
   'use strict';
 

source/javascripts/lib/jquery.tocify.js → source/javascripts/lib/_jquery.tocify.js

-//= require ./jquery_ui
 /* jquery Tocify - v1.8.0 - 2013-09-16
 * http://www.gregfranko.com/jquery.tocify.js/
 * Copyright (c) 2013 Greg Franko; Licensed MIT