Use done() to assert that last the 'then' executed

in a tag test
Add _test suffix to tags test file
Add Ticket#removeTag(...)
Add list of tags to ticket api instead of status string
Add 'nohandlers' tag to new tickets

and remove it automatically when a handler is added
Simplify ticket updates test

was way too fragile
Add models.client.Base#collection() shortcut
Loads tags for single ticket api too
Use Ticket#tags() to infer ticket status
Fix status test
Remove old test

There's no status string anymore
Update deps
Ansible rule for puavo standalone installation
puavo-standalone (slapd) packages are not available for the trusty
slapd packages could not get from the git-master
JSON column type works only version 9.3 or higher (postgresql)
Configuration for puavo-ticket (development)
Install nodejs moduiles, generate documentation and install git hooks
Run puavo-init-standalone only once
Create organisations for development