Basic end dialogue state
Remove go.campaign.dialogue.states.dummy.js addition from this branch (it is irrelevant to this PR, was added by mistake)
Remove unnecessary fluff from dialogue end state's tests
Fix up badly named end dialogue state tests (a side effect of mindless copy pasting)
Add forgotten dummy dialogue state
Merge branch 'develop-frontend' of github.com:praekelt/vumi-go into develop-frontend
Merge branch 'develop-frontend' into feature/issue-438-end-dialogue-state