renamed .html templates.
`Let there be no more reference to recipients` he said... And it was so.
changed app menu name.
renamed recipients.
Merge branch 'develop-frontend' into feature/rename-recipients-to-contacts
Merge branch 'rename-recipients-to-contacts' into develop-frontend

Conflicts:
	go/campaigns/urls.py
Merge branch 'develop-frontend' of github.com:praekelt/vumi-go into develop-frontend