Moved CSS and images into subdirectories.

Now the only actual site files in the root directory are the HTML files.

_layouts/page.html

@@ -5,9 +5,9 @@
 <meta name="mobile-web-app-capable" content="yes">
 <meta name="apple-mobile-web-app-capable" content="yes">
 <title>LOOT: {{ page.title }}</title>
-<link rel="stylesheet" href="/style.css">
-<link rel="stylesheet" href="/overrides.css" shim-shadowdom>
-<link rel="shortcut icon" type="image/ico" href="/icon.ico">
+<link rel="stylesheet" href="/css/style.css">
+<link rel="stylesheet" href="/css/overrides.css" shim-shadowdom>
+<link rel="shortcut icon" type="image/ico" href="/images/icon.ico">
 
 <script src="/bower_components/webcomponentsjs/webcomponents.min.js"></script>
 <link rel="import" href="/polymer-loader.vulcanized.html">
@@ -17,7 +17,7 @@
     <core-drawer-panel drawerWidth="276px">
         <div drawer layout vertical>
             <core-toolbar>
-                <img alt="LOOT" src="/icon.png">
+                <img alt="LOOT" src="/images/icon.png">
                 <h1 class="display1 dark">LOOT</h1>
             </core-toolbar>
             <nav flex>
@@ -35,7 +35,7 @@
                 </a></paper-item>
                 <div class="subheader">On GitHub</div>
                 <paper-item><a href="https://github.com/loot">
-                    <core-icon src="/github-mark.svg"></core-icon>Code
+                    <core-icon src="/images/github-mark.svg"></core-icon>Code
                 </a></paper-item>
                 <paper-item><a href="https://github.com/loot/loot.github.io/wiki">
                     <core-icon icon="subject"></core-icon>Wiki