chore(controller): update celery to 3.1.11

http://docs.celeryproject.org/en/latest/changelog.html#version-3-1-11

Author: mboersma

Dockerfile

@@ -12,7 +12,7 @@ RUN wget -qO- https://raw.githubusercontent.com/pypa/pip/1.5.5/contrib/get-pip.p
 RUN apt-get install -yq git
 
 # install requirements before ADD to cache layer and speed build
-RUN pip install celery==3.1.8 \
+RUN pip install celery==3.1.11 \
                 Django==1.6.4 \
                 django-allauth==0.15.0 \
                 git+https://github.com/deis/django-fsm@add-exception-handling \

requirements.txt

@@ -3,7 +3,7 @@
 # NOTE: For testing on Mac OS X Mavericks, use the following to work around a clang issue:
 # ARCHFLAGS=-Wno-error=unused-command-line-argument-hard-error-in-future pip install [pycrypto]
 #
-celery==3.1.8
+celery==3.1.11
 Django==1.6.4
 django-allauth==0.15.0
 # HACK: use bacongobbler's feature branch until