New batch system! Hopefully nothing else broke...

Attempt number 5,176 at a decent batch system, we'll see.

tailbone/templates/batch/index.mako

@@ -0,0 +1,12 @@
+## -*- coding: utf-8 -*-
+<%inherit file="/grid.mako" />
+
+<%def name="title()">${batch_display_plural}</%def>
+
+<%def name="context_menu_items()">
+  % if request.has_perm('{0}.create'.format(permission_prefix)):
+      <li>${h.link_to("Create a new {0}".format(batch_display), url('{0}.create'.format(route_prefix)))}</li>
+  % endif
+</%def>
+
+${parent.body()}