Document requirement on Chef 12+

[davidski]

The rewrite to use poise2 means that this cookbook now has a requirement on Chef 12+. Not usually a problem except for us poor souls trying to run this on AWS OpsWorks, which is currently stuck on Chef 11. :sad: Adding an issue to provide a search hit for anyone else trying to use the rewritten cookbooks on AWS.

[martinb3]

@davidski if the previous releases (the 0.x branch) work for you, those are definitely still available. For what it's worth, there's a branch in place that removes poise, but it significantly increases the verbosity of what's in the libraries. I'm not sure if it's worth merging yet.

[davidski]

Thanks, @martinb3! I'm still happily using the 0.3.x branch. I just wanted to play with the new rewrite. I totally understand the dependency on poise and Chef12. Other community cookbooks, such as the Kibana cookbook, are starting to become Chef12 dependent. This is completely an AWS problem. Of course, a doc note would be spiffy. 😄