in your layouts / application you just need to:
<%= javascript_include_tag "application" %> <%= stylesheet_link_tag "application", media: "all" %>
and in app / assets / stylesheets / application.css you just need to:
*=require_self *=require_tree .
and in app / assets / javascripts / application.js
//= require jquery //= require jquery_ujs //= require_tree .
And there you need to include all the files
You will have problems with production, if you include js files, to avoid this, you should add such files, ex: "fullcalendar.js" to config / production.rb, config. assets.precompile + =% W (fullcalendar.js) and then run rake asset: precompile
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