Working user and link list, (big)restructure

This is now a workspace consisting of:
  * the pslink app (a wasm frontend for the admin interface)
  * the pslink binary
  * shared - modules for communication between the two above.

pslink/templates/base.html

@@ -0,0 +1,21 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <title>{{title}}</title>
+    <meta name="author" content="Franz Dietrich">
+    <meta http-equiv="robots" content="[noindex|nofollow]">
+    <link rel="stylesheet" href="/static/style.css">
+    {% block head %}
+    {% endblock %}
+</head>
+
+<body>
+    <div class="content">
+        {% block content %}
+        {% endblock %}
+    </div>
+</body>
+
+</html>