Agree on a baseline Ansible version

[KellerFuchs]

It would be much easier to improve the playbooks and roles if we know which version of Ansible we are targetting.

Currently, we use some v1.9 features (v1.9 is in jessie-backports), but cleaning up on error (in #12 for instance) is much easier using blocks ... which are a v2.0 feature.
Ansible 2.0 is available in Debian Stretch, and it looks like the pin shouldn't be problematic (unlike the weechat one, which ran into ABI breakages).

Admins in agreement:

• @ChickenNuggers
• @daurnimator
• @drGrove
• @KellerFuchs
• @lrvick

[KellerFuchs]

@hashbang/administrators OK for Ansible 2.0?

[KellerFuchs]

@hashbang/administrators Ping

[daurnimator]

I'm fine with ansible 2.0. Please do wait for a couple of other admins to approve too though.

[KellerFuchs]

@hashbang/administrators Ping.

[RyanSquared]

No problem with 2. Just stick with a single version.

[KellerFuchs]

@ChickenNuggers The thing is (mostly) backwards-compatible, but there are some features which aren't forward-compatible yet useful for cleaner error-handling.

[daurnimator]

Didn't you already merge the PR? Seems the debate has ended :P

[KellerFuchs]

@drGrove @lrvick didn't comment, but #18 was merged.