#19 Tests

* refactors CheckableMixin and RecordableMixin into CheckableObject and RecordableObject
* adds ShareableObject for wrapping share related fields and functionality
* adds share functionality to EcoAccount and EMA, just like Intervention

ema/urls.py

@@ -22,6 +22,8 @@ urlpatterns = [
     path('<id>/state/new', state_new_view, name='new-state'),
     path('<id>/action/new', action_new_view, name='new-action'),
     path('<id>/deadline/new', deadline_new_view, name="new-deadline"),
+    path('<id>/share/<token>', share_view, name='share'),
+    path('<id>/share', create_share_view, name='share-create'),
 
     # Documents
     # Document remove route can be found in konova/urls.py