docs(contrib/ec2): add ssh-add command

fleetctl requires that you add your SSH key to the SSH agent
before running a new tunnel.
docs(contrib/ec2): use public DNS name

The IP address listed when you run `fleetctl list-units` is the
machine's private IP address. Using the public DNS name will
route properly to the server.
feat(logger): add new syslog daemon based on https://github.com/ziutek/syslog
feat(logger): use new logger component from controller
fix(coreos): add wait_for_announcer to block until containers are ready
docs(scheduler): updated CLI instructions and developer docs
fix(controller): use Deis' fork of django-fsm
docs(scheduler): add migration doc, update faq and localdev
fix(registry): Use cache host and port from confd

The registry was crashing when trying to read cache
settings from unset environment variables.
confd is now also population those settings.

I also disabled the LRU cache as this requires a redis in LRU mode:
http://redis.io/topics/config
docs(scheduler): update "provision a controller" doc
docs(scheduler): mention coreos-vagrant reboot known issue
fix(controller): use django.conf

you should always import from django.conf rather than importing
from the local package. That way, things like the
@override_settings decorator in Django 1.4 will work.

See also 3c6d7925ae and #547
docs(scheduler): add reminder about migration and v0.7.0
Merge pull request #713 from opdemand/scheduler

refactor(scheduler): use coreos/fleet for container scheduling
fix(router): docker build fails when apt archive is stale

`apt-get update` before the first apt command seems to fix this
in general.
Merge pull request #733 from opdemand/fix-router-build

fix(router): docker build fails when apt archive is stale
fix(controller/systemd): schedule on same machine as logger

Since the controller currently depends on a volume that deis-logger
provides, they must be on the same machine.
Merge pull request #734 from opdemand/fix_controller_unit

fix(controller/systemd): schedule on same machine as logger
fix(docs): mention "easy-fix" tag in contributing docs

Fixes #723.
docs(migrating): remove "nothing changes" phrase

Fixes #701.