Initial work towards template support

* Simple refactoring of the config system
* Add new unstyled template
* Add new modern template (previously the only)
* Add placeholder for blocky template
* Relocate autoloader
* Move build to ./bin

templates/unstyled/css/pdf.css

@@ -0,0 +1,16 @@
+body.pdf {
+    color: black;
+    
+    a {
+        text-decoration: none;
+        color: black;
+    }
+    .container {
+        width: 1000px;
+        margin: 0 auto;
+        padding: 0;
+        background: none;
+        border: none;
+        text-align: left;
+    }
+}