update PyMySQL from 0.5 to 0.6.1
update circus from 0.9.2 to 0.10.0 (plus dependencies)
update simplejson from 3.1.0 to 3.3.1
update from celery 3.0.22 to 3.1.1
remove test-only task and its tests

we have enough tests of real tasks to cover all the code paths
change celery task base class to ignore result by default

and fix `cleanup_kombu_message_table` to ignore results as well
use new celery 3.1 bound tasks with the more readable `self` argument
update heka-py from 0.10 to 0.30.2
update colander from 1.0a5 to 1.0b1