[Frontend] WIP Style Guide

Fixes #1233
Style-guide thematic color constants added;
Normalized doc-title content across files;
Additional detail in glyphs.html;

example/styleguide/res/templates/input.html

@@ -20,7 +20,7 @@
  at runtime from the About dialog for additional information.
 -->
 <div class="l-style-guide s-text">
-    <p class="doc-title">Open MCT Style Guide: Text Input</p>
+    <p class="doc-title">Open MCT Style Guide</p>
     <h1>Text Input</h1>
     <div class="l-section">
         <p>Intro about text input elements.</p>