Should cover #285 and #272.

If someone else could check it out, that would be much appreciated

@ricardclau struggling to utilize a clean implementation to support serial deploys

ansible-playbook -i hosts -e "ansistrano_release_version=date -u +%Y%m%d%H%M%SZ" deploy.yml

I use ansible tower/awx so i cant really interact with with the shell like you can in this context.

Maybe i could just use a filter inside the play like ansistrano_release_version: {{ '%Y%m%d%H%M%SZ' | strftime(ansible_date_time.epoch) }} seems like this should work in theory?