Add support for new Purchase/Batch views, 'create row' master pattern

More refactoring here but hopefully not that important..

tailbone/templates/master/create_row.mako

@@ -0,0 +1,10 @@
+## -*- coding: utf-8 -*-
+<%inherit file="/master/create.mako" />
+
+<%def name="title()">New ${row_model_title}</%def>
+
+<%def name="context_menu_items()">
+  <li>${h.link_to("Back to {}".format(model_title), index_url)}</li>
+</%def>
+
+${parent.body()}

tailbone/templates/master/edit_row.mako

@@ -10,7 +10,7 @@
       <li>${h.link_to("Delete this {}".format(row_model_title), row_action_url('delete', instance))}</li>
   % endif
   % if master.rows_creatable and request.has_perm('{}.create'.format(row_permission_prefix)):
-      <li>${h.link_to("Create a new {}".format(row_model_title), url('{}.create'.format(row_route_prefix)))}</li>
+      <li>${h.link_to("Create a new {}".format(row_model_title), url('{}.create_row'.format(route_prefix), uuid=row_parent.uuid))}</li>
   % endif
 </%def>
 

tailbone/templates/purchases/batches/index.mako

@@ -0,0 +1,11 @@
+## -*- coding: utf-8 -*-
+<%inherit file="/master/index.mako" />
+
+<%def name="context_menu_items()">
+  ${parent.context_menu_items()}
+  % if request.has_perm('purchases.batch'):
+      <li>${h.link_to("Go to Purchases", url('purchases'))}</li>
+  % endif
+</%def>
+
+${parent.body()}

tailbone/templates/purchases/index.mako

@@ -0,0 +1,11 @@
+## -*- coding: utf-8 -*-
+<%inherit file="/master/index.mako" />
+
+<%def name="context_menu_items()">
+  ${parent.context_menu_items()}
+  % if request.has_perm('purchases.batch.list'):
+      <li>${h.link_to("Go to Purchase Batches", url('purchases.batch'))}</li>
+  % endif
+</%def>
+
+${parent.body()}