How to check if Twitter Bootstrap plugins are loaded successfully? - css

I am new to Twitter Bootstrap. I am working on a webpage. It works fine when I use Bootstrap CDN. When I remove the Bootstrap CDN and try to use Twitter Bootstrap plugin, it seems unable to access the Bootstrap plugin. The webpage becomes a blank page where only words are displayed.
I have two questions here:
How to check if I have installed the Twitter Bootstrap plugin successfully. Here is the link I have followed to install it. I also follow the instructions in the documentation provided on the webpage.
How to check if the Twitter Bootstrap plugin is loaded successfully?
Here is the HTML code in my sample.
It works partially (some parts are working) when i remove the comment for meta name="layout"
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Comment Home</title>
<!--meta name="layout" content="main"/-->
<!--meta name="viewport" content="width=device-width, initial-scale=1"-->
</head>
<body>
<div class="container">
<div class="header clearfix">
<nav>
<ul class="nav nav-pills pull-right">
<li role="presentation" class="active">Home</li>
<li role="presentation">About</li>
<li role="presentation">Contact</li>
</ul>
</nav>
<h3 class="text-muted">Online Library System</h3>
</div>
<div class="jumbotron">
<h1>Kowledge is everything!</h1>
<p class="lead">For the new member please sign up today to get the privilledge.</p>
<p><a class="btn btn-lg btn-success" href="#" role="button">Sign up today</a></p>
</div>
<div class="row marketing">
<div class="col-lg-6">
<h4>Top book</h4>
<div class="col-lg-6">
<table class="table">
<tr>
<td>
<g:img dir="images" file="index.jpeg" width="110" height="140px"/>
</td>
<td>
<g:img dir="images" file="index2.jpeg" width="110" height="140px"/>
</td>
<td>
<g:img dir="images" file="index3.jpeg" width="110" height="140px"/>
</td>
</tr>
</table>
</div>
<div class="col-lg-6">
</div>
</div>
<div class="col-lg-6">
<h4>Regulation & Rules</h4>
<p>Penalty charges will be required upon any overdue. </p>
<p><i> *Charges will be diffence based on the book access level.</i></p>
<hr>
<h4>Operating Day</h4>
<p>Monday - Sunday : 8:00AM to 10:00PM</p>
<hr>
<h4>Address</h4>
<p>Perpustakaan Negara Malaysia (Ibu Pejabat)</p>
<p>232, Jalan Tun Razak,</p>
<p>50572 Kuala Lumpur, Malaysia.</p>
</div>
</div>
<footer class="footer">
<p>© 2015 Company, Inc.</p>
</footer>
</div> <!-- /container -->
<!-- IE10 viewport hack for Surface/desktop Windows 8 bug -->
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
</body>
</html>
Here is my main.gsp
<!DOCTYPE html>
<!--[if lt IE 7 ]> <html lang="en" class="no-js ie6"> <![endif]-->
<!--[if IE 7 ]> <html lang="en" class="no-js ie7"> <![endif]-->
<!--[if IE 8 ]> <html lang="en" class="no-js ie8"> <![endif]-->
<!--[if IE 9 ]> <html lang="en" class="no-js ie9"> <![endif]-->
<!--[if (gt IE 9)|!(IE)]><!--> <html lang="en" class="no-js"><!--<![endif]-->
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<title><g:layoutTitle default="Grails"/></title>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="shortcut icon" href="${assetPath(src: 'favicon.ico')}" type="image/x-icon">
<link rel="apple-touch-icon" href="${assetPath(src: 'apple-touch-icon.png')}">
<link rel="apple-touch-icon" sizes="114x114" href="${assetPath(src: 'apple-touch-icon-retina.png')}">
<asset:stylesheet src="application.css"/>
<asset:javascript src="application.js"/>
<g:layoutHead/>
</head>
<body>
<div id="grailsLogo" role="banner"><asset:image src="grails_logo.png" alt="Grails"/></div>
<g:layoutBody/>
<div class="footer" role="contentinfo"></div>
<div id="spinner" class="spinner" style="display:none;"><g:message code="spinner.alt" default="Loading…"/></div>
</body>
</html>

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Any ideas or best practices?
You want the Thymeleaf Layout Dialect.

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