Add management command for listing opt outs.
Merge branch 'feature/issue-190-add-command-for-listing-opt-outs' into develop
Fix buglet in call to sort() in email summary sending.
pep8 fixes
removing unused publishers
checking for URLs to post to
event URL checking
pep8 fixes
tests
logging for bad resp codes
being good citizens & publishing charset for JSON
management command + test
removing stray debug print statements
initial HTTP API docs
rest formatting
tabs -> spaces
missing newline
Merge branch 'feature/VUMIGO-283-http-api-inbound-push' into develop
Merge branch 'develop' into feature/VUMIGO-176-endpoint-based-routing

Conflicts:
	go/apps/http_api/tests/test_vumi_app.py
	go/apps/http_api/vumi_app.py