Update dependency versions

requirements/base.txt

@@ -1,11 +1,8 @@
-amqp==1.4.6
-bpython==0.13.1
-anyjson==0.3.3
-argparse==1.2.1
-billiard==3.3.0.19
-celery==3.1.17
-kombu==3.0.24
-pytz==2014.10
-wsgiref==0.1.2
+amqp==1.4.9
+bpython==0.15.0
+billiard==3.3.0.22
+celery==3.1.20
+kombu==3.0.33
+pytz==2015.7
 PyYAML==3.11
 -e git+https://git.gnuviech-server.de/gvacommon.git@0.3.0#egg=gvacommon

requirements/local.txt

@@ -1,4 +1,4 @@
 # Local development dependencies go here
 -r test.txt
-Sphinx==1.2.3
-releases==0.7.0
+Sphinx==1.3.5
+releases==1.0.0

requirements/test.txt

@@ -1,3 +1,3 @@
 # Test dependencies go here.
 -r base.txt
-coverage==3.7.1
+coverage==4.0.3