Started work on cli, which also meant adding setup.py

I'm using click, and click recommends using a setup.py - so I've added one of
those. I also refactored code into a new datasite package. It's not quite
deploying to now properly at the moment though - I seem to have messed up the
path handling a bit.

Also snuck in a new template for the "Row" view.

Refs #40

datasite/templates/database.html

@@ -0,0 +1,35 @@
+{% extends "base.html" %}
+
+{% block title %}{{ database }}{% endblock %}
+
+{% block content %}
+<h1>{{ database }}</h1>
+
+<p><a href="/{{ database }}-{{ database_hash }}.db">download {{ database }}.db</a></p>
+
+<style>
+td {
+    vertical-align: top;
+    border-top: 1px solid #666;
+    padding: 2px 4px;
+}
+</style>
+<table>
+    <tr>
+        {% for column in columns %}<th scope="col">{{ column }}</th>{% endfor %}
+    </tr>
+    {% for row in rows %}
+        <tr>
+            {% for td in row %}
+                <td>
+                    {% if loop.index == 2 and row.type in ("table", "view") %}
+                        <a href="/{{ database }}-{{ database_hash }}/{{ td }}">{{ td }}</a>
+                    {% else %}
+                        {{ td }}
+                    {% endif %}
+                </td>
+            {% endfor %}
+        </tr>
+    {% endfor %}
+</table>
+{% endblock %}