Can the wrapper be always released as a branch per ES version?

[aneeshjoshi]

First of all, thanks for this service wrapper. Can I recommend creating branches per ES version based on compatibility, similar to the way https://github.com/elasticsearch/elasticsearch-cloud-aws does it.

This will allow anyone using your code to have confidence in which ES versions a given servicewrapper branch works.

I am in the process of upgrading from 0.90.2 to 1.3.4 and if I am simply sourcing master as part of my Ansible process then it leaves me exposed to potential breaking changes when you upgrade for another version of ES.