feat(contrib/ec2): add optional support for IAM instance profiles
fix(contrib): use 1GB per VM

Most modern laptops have ~8GB of memory available to them. On OSX,
this is stretched even thinner due to boot2docker. Lowering the memory
requirement for each host back to CoreOS' default memory requirements
should allow us to use Vagrant on machines with less than 16GB of
memory.
re-revert "ref(tests): switch to example-dockerfile-http app"

example-dockerfile-http has switched over to ubuntu:trusty for better
compatibility with apps:run (busybox does not ship with bash).

This reverts commit ebded177705e257d8227a836bade85331d56f8d7.
feat(registry): deis-cache for saving meta data

This improves the registry speed with remote stores and
the developer UX by removing frightening warnings

Fixes #1780, fixes #1794
fix(builder): delete images on destroy
docs(hacking+README): clarify that deis CLI requires python 2.7
Merge pull request #1858 from johanneswuerbach/lru-cache

feat(registry): deis-cache for saving meta data
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
fix(Makefile): remove CLIENTS from release task

Both deis client and deisctl do not have release tasks.
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
Merge pull request #2747 from bacongobbler/cache-images

fix(builder): delete images on destroy
ref(deisctl): use package version
Merge pull request #2750 from bacongobbler/example-dockerfile-http

re-revert "ref(tests): switch to example-dockerfile-http app"
Merge pull request #2776 from ngpestelos/remove-clients-from-release

fix(Makefile): remove CLIENTS from release task
fix(contrib): use tab indents for Makefiles
feat(builder): add cedarish/build target
chore(builder): bump cedarish
fix(deisctl): hook up unit tests