update links, new version to v3.4.0, add new baseurl for easy v3.4 building

docs/index.html

@@ -27,7 +27,7 @@ title: Bootstrap · The world's most popular mobile-first and responsive f
       <div class="col-sm-4">
         <img src="assets/img/sass-less.png" alt="Sass and Less support" class="img-responsive">
         <h3>Preprocessors</h3>
-        <p>Bootstrap ships with vanilla CSS, but its source code utilizes the two most popular CSS preprocessors, <a href="../css/#less">Less</a> and <a href="../css/#sass">Sass</a>. Quickly get started with precompiled CSS or build on the source.</p>
+        <p>Bootstrap ships with vanilla CSS, but its source code utilizes the two most popular CSS preprocessors, <a href="{{ site.baseurl }}/css/#less">Less</a> and <a href="{{ site.baseurl }}/css/#sass">Sass</a>. Quickly get started with precompiled CSS or build on the source.</p>
       </div>
       <div class="col-sm-4">
         <img src="assets/img/devices.png" alt="Responsive across devices" class="img-responsive">
@@ -67,7 +67,7 @@ title: Bootstrap &middot; The world's most popular mobile-first and responsive f
 <div class="bs-docs-featurette">
   <div class="container">
     <h2 class="bs-docs-featurette-title">Built with Bootstrap</h2>
-    <p class="lead">Millions of amazing sites across the web are being built with Bootstrap. Get started on your own with our growing <a href="../getting-started/#examples">collection of examples</a> or by exploring some of our favorites.</p>
+    <p class="lead">Millions of amazing sites across the web are being built with Bootstrap. Get started on your own with our growing <a href="{{ site.baseurl }}/getting-started/#examples">collection of examples</a> or by exploring some of our favorites.</p>
 
     <hr class="half-rule">