Callback Hell - Githubissues

Rework all the conversations so that they are prebuilt and then executed:

svlo-task-api.js is already quite nice.
functions.js needs to be split up into:
- post.js that is mainly there to throw tasks into slack,
- verify.js to verify
- and a new functions.js that does no callback functions.
- Put everything depending on bot and controller back into elsje.js
elsje.js should only be there to setup listeners and prepare conversations
- conversation functions into separate 'conversation' files

steefmin / elsje