Update requirements.

requirements.txt

@@ -5,7 +5,7 @@
 #    pip-compile --output-file requirements.txt requirements.in
 #
 
-abilian-core==0.6.11.3
+abilian-core==0.7.2
 alembic==0.8.6            # via abilian-core, flask-migrate
 amqp==1.4.9               # via kombu
 anyjson==0.3.3            # via kombu
@@ -75,9 +75,9 @@ typing==3.5.1.0
 validate-email==1.3
 validators==0.10.1        # via wtforms-components
 webassets==0.11.1         # via flask-assets
-Werkzeug==0.11.10         # via flask, flask-debugtoolbar, flask-wtf
+werkzeug==0.11.10         # via flask, flask-debugtoolbar, flask-wtf
 Whoosh==2.5.7             # via abilian-core
 WTForms-Alchemy==0.15.0   # via abilian-core
 WTForms-Components==0.10.0  # via abilian-core, wtforms-alchemy
 WTForms==2.1              # via flask-wtf, wtforms-alchemy, wtforms-components
-xlwt==1.0.0
+xlwt==1.1.1