Add literals for checkout state and state icons

apps/checkouts/literals.py

@@ -1 +1,16 @@
 from __future__ import absolute_import
+
+from django.utils.translation import ugettext_lazy as _
+
+STATE_CHECKED_OUT = 'checkedout'
+STATE_CHECKED_IN = 'checkedin'
+
+STATE_ICONS = {
+    STATE_CHECKED_OUT: 'basket_put.png',
+    STATE_CHECKED_IN: 'traffic_lights_green.png',
+}
+
+STATE_LABELS = {
+    STATE_CHECKED_OUT: _(u'checked out'),
+    STATE_CHECKED_IN: _(u'checked in/available'),
+}