feat(contrib/ec2): add optional support for IAM instance profiles
docs(hacking+README): clarify that deis CLI requires python 2.7
Merge pull request #2625 from sopel/support-iam-instance-profiles

feat(contrib/ec2): add optional support for IAM instance profiles
chore(store): remove redundant Makefile task
Merge pull request #2765 from mboersma/deis-cli-py27

docs(hacking+README): clarify that deis CLI requires python 2.7
Merge pull request #2775 from ngpestelos/remove-redundant-makefile-task

chore(store): remove redundant Makefile task