Bring the customizer up to speed

I reworked the customizer to match the new docs layout and include all
newly added variables, etc.
Would be glad to keep an eye on Customize and update it as v3 changes.
Help blocks in my new version need some more work, too, so this is just
a basis.

docs/_includes/nav-customize.html

@@ -0,0 +1,37 @@
+<li>
+  <a href="#components">LESS components</a>
+  <ul class="nav">
+    <li><a href="#components-basics">The basics</a></li>
+    <li><a href="#components-standard">Standard styles</a></li>
+    <li><a href="#components-features">Bootstrap features</a></li>
+  </ul>
+</li>
+<li>
+  <a href="#plugins">jQuery plugins</a>
+</li>
+<li>
+  <a href="#variables">LESS variables</a>
+  <ul class="nav">
+    <li><a href="#customize-basics">The basics</a></li>
+    <li><a href="#customize-buttons">Buttons</a></li>
+    <li><a href="#customize-form-states">Form states</a></li>
+    <li><a href="#customize-alerts">Alerts</a></li>
+    <li><a href="#customize-navbar">Navbar</a></li>
+    <li><a href="#customize-tables">Tables</a></li>
+    <li><a href="#customize-forms">Forms</a></li>
+    <li><a href="#customize-dropdowns">Dropdowns</a></li>
+    <li><a href="#customize-panels-wells">Panels and wells</a></li>
+    <li><a href="#customize-jumbotron">Jumbotron</a></li>
+    <li><a href="#customize-modals">Modals</a></li>
+    <li><a href="#customize-list-group">List group</a></li>
+    <li><a href="#customize-thumbnails">Thumbnails</a></li>
+    <li><a href="#customize-progress">Progress bars</a></li>
+    <li><a href="#customize-pagination">Pagination</a></li>
+    <li><a href="#customize-labels">Labels</a></li>
+    <li><a href="#customize-tooltips-popovers">Tooltips and popovers</a></li>
+    <li><a href="#customize-other">Other</a></li>
+  </ul>
+</li>
+<li>
+  <a href="#download">Download</a>
+</li>

docs/_layouts/default.html

@@ -31,6 +31,8 @@
                  {% include nav-components.html %}
               {% elsif page.slug == "js" %}
                  {% include nav-javascript.html %}
+              {% elsif page.slug == "customize" %}
+                 {% include nav-customize.html %}
               {% endif %}
             </ul>
           </div>

docs/assets/css/docs.css

@@ -94,6 +94,29 @@ body {
 
 
 
+/* Customize and Download button
+-------------------------------------------------- */
+
+.bs-customize-download {
+  text-align:center;
+}
+.bs-customize-download .btn {
+  margin-top: 5px;
+  margin-bottom: 5px;
+  padding: 18px 24px;
+  font-size: 21px;
+  color: #b94a48;
+  background-color: #fff;
+  border-color: #b94a48;
+}
+.bs-customize-download .btn:hover,
+.bs-customize-download .btn:active {
+  color: #fff;
+  background-color: #b94a48;
+}
+
+
+
 /* Docs pages and sections
 -------------------------------------------------- */