WidgyPageAdmin cant always check for review_queue

If widgy.contrib.review_queue is not in INSTALLED_APPS,
WidgyPageAdmin.has_review_queue() will throw a NameError whenever
an admin tries to edit a widgy page through the admin interface.

Author: Scott Clark

CHANGELOG.rst

@@ -1,6 +1,12 @@
 Changelog
 =========
 
+0.3.2 (unreleased)
+-----------------
+
+Bugfix - Allow WidgyAdmin to check for ReviewedWidgySite without review_queue
+installed [Scott Clark, #265]
+
 0.3.1 (2014-10-01)
 ------------------
 

widgy/contrib/widgy_mezzanine/admin.py

@@ -24,6 +24,7 @@
 from widgy.forms import WidgyFormMixin, VersionedWidgyWidget
 from widgy.contrib.widgy_mezzanine import get_widgypage_model
 from widgy.contrib.widgy_mezzanine.views import ClonePageView, UnpublishView
+from widgy.contrib.review_queue.site import ReviewedWidgySite
 from widgy.utils import format_html
 from widgy.db.fields import get_site
 
@@ -295,7 +296,6 @@ def publish_page_on_approve(sender, instance, created, **kwargs):
 if 'widgy.contrib.review_queue' in settings.INSTALLED_APPS:
     from widgy.contrib.review_queue.admin import VersionCommitAdminBase
     from widgy.contrib.review_queue.models import ReviewedVersionCommit
-    from widgy.contrib.review_queue.site import ReviewedWidgySite
 
     class VersionCommitAdmin(VersionCommitAdminBase):
         def get_site(self):