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

templates/table.html

@@ -1,35 +0,0 @@
-{% extends "base.html" %}
-
-{% block title %}{{ database }}: {{ table }}{% endblock %}
-
-{% block content %}
-<h1><a href="/{{ database }}-{{ database_hash }}">{{ database }}</a></h1>
-
-<h2>{{ table }}{% if total_rows != None %} ({{ "{:,}".format(total_rows) }} total row{% if total_rows == 1 %}{% else %}s{% endif %} in this table){% endif %}</h2>
-
-<style>
-td {
-    white-space: pre;
-    vertical-align: top;
-    border-top: 1px solid #666;
-    padding: 2px 4px;
-}
-</style>
-<table>
-    <tr>
-        {% if primary_keys and row_link %}<th scope="col">Link</th>{% endif %}
-        {% for column in columns %}<th scope="col">{{ column }}</th>{% endfor %}
-    </tr>
-    {% for row in rows %}
-        <tr>
-            {% if primary_keys and row_link %}
-                <td><a href="/{{ database }}-{{ database_hash }}/{{ table }}/{{ row_link(row) }}">{{ row_link(row) }}</a></td>
-            {% endif %}
-            {% for td in row %}
-                <td>{{ td }}</td>
-            {% endfor %}
-        </tr>
-    {% endfor %}
-</table>
-{% if took_ms %}<small>Took {{ took_ms }}</small>{% endif %}
-{% endblock %}