feat(controller): add endpoint and infrastructure for limiting memory/cpu
feat(client): add commands for managing memory/cpu limits
docs(client): add more clarity to limit:set
docs(client): more clarity on limit:set options
docs(reference): add deis limit autodocs
ref(client): rename limit to limits

'limits' follows our other commands' syntax much better i.e. apps:list,
releases:rollback etc.
docs(client): more clarity on limits:set
ref(client): move options from argument list
fix(client): move options list before arguments

Docopt does not allow additional commands after ellipsis as it's hard
to determine when they end (e.g. is this argument an arg or an option?).
ref(controller): move limits to Config model

A Release is a Build and a Config, not a Build, Config and a Limit.
Limits make sense as configuration for the Build, so this moves it
over as a Config field.
style(client): flake8
fix(controller): rename /limit to /limits
docs(controller): add Limit server autodocs
style(controller): revert code folding
chore(*): update CoreOS to 402.2.0; Docker to 1.1.2

Note that this release is important because it has several big fixes:

* etcd 0.4.6 (with a fix for a major memory leak)
* fleet 0.6.2 (with major rewrites for stability)
* Docker 1.1.2 (with additional port allocation and container fixes)

Because with this Docker release the format of `docker inspect`
has changed, we must change the ANNOUNCE_TEMPLATE. We also have to
change `fleetctl list-units` in the CoreOS scheduler because we
are getting more columns of output now.

We also must change the device name on EC2 back to `/dev/sda`. See
https://github.com/coreos/scripts/pull/311
docs(contrib/rackspace): add manual update instructions
fix(Makefile): fix check-fleet Makefile target

Just a little indentation issue.
Merge pull request #1543 from deis/1505-fix_check_fleet

fix(Makefile): fix check-fleet Makefile target
Merge pull request #1541 from deis/coreos_402.2.0

chore(*): update CoreOS to 402.2.0; Docker to 1.1.2
fix(docs): correct the upgrade flag syntax for pip