provided better doc on how to run colorbox for #4

examples/themes/colorbox/templates/README

@@ -0,0 +1,3 @@
+To make this play nicely with limited modification, move siglican_gallery.html
+to your Pelican template. This will provide an entry point to colorbox which is
+driven by album.html here. 

examples/themes/colorbox/templates/siglican_gallery.html

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+{% extends "base.html" %}
+{% block content %}
+<h2>albums</h2>
+<hr>
+<div class="row">
+{% for aname,album in ROOT_ALBUMS.iteritems() %}
+  {% if loop.last %}
+    <div class="four columns end" style="text-align:right;">
+  {% else %}
+    <div class="four columns" style="text-align:right;">
+  {% endif %}
+<a href="{{ SITEURL }}/{{ SIGLICAN_DESTINATION }}/{{ album.url }}"><img src="{{ SITEURL }}/{{ SIGLICAN_DESTINATION }}/{{ album.thu
+mbnail }}"><br>{{ aname }}</a><p>
+  </div>
+{% endfor %}
+</div>
+{% endblock %}