add basic csv export so we can curl it

jmdc-ui/jmdc_app/routes.py

@@ -8,3 +8,4 @@ def includeme(config):
     config.add_route('jmdc_catalog', '/')
     config.add_route('jmdc_doc', '/doc')
     config.add_route('jmdc_about', '/about')
+    config.add_route('jmdc_export_csv', '/export_csv')

jmdc-ui/jmdc_app/templates/jmdc_catalog.jinja2

@@ -53,4 +53,7 @@
             -->
             </script>
         </div>
+        <div>
+          <a href="./export_csv" title="export as csv" target="_blank"><button>Export all as CSV</button></a>
+        </div>
 {% endblock content %}

jmdc-ui/jmdc_app/templates/jmdc_export_csv.jinja2

+id1,id2,ud_diam,ld_diam,e_ld_diam,band,mu_lambda,method,band_code,notes,bibcode,com{% for star in stars %}{% if star.star_info_entry.0.validated%}{{star.id1}},{{star.id2}},{{star.ud_diam}},{{star.ld_diam}},{{star.e_ld_diam}},{{star.band}},{{star.mu_lambda}},{{star.method}},{{star.band_code}},"{{star.notes}}",{{star.bibcode}},"{{star.com}}"{% endif %}
+{% endfor %}

jmdc-ui/jmdc_app/views/jmdc_export_csv.py

+from pyramid.response import Response
+from pyramid.view import view_config
+from sqlalchemy.exc import DBAPIError
+
+from jmdc_app.models.star_info import StarInfo
+
+@view_config(route_name='jmdc_export_csv', renderer='../templates/jmdc_export_csv.jinja2')
+def jmdc_export_csv(request):
+
+    session = request.dbsession
+
+    stars = session.query(StarInfo).all()
+
+    return { 'stars': stars }