docs(chef): update for the new manage.opscode.com

Deis docs' current reference to https://manage.opscode.com/groups/admins/edit for hosted Chef is now invalid since their web UI was updated. This corrects references to that and to preview.opscode.com, and makes clear that the client is named "deis-controller-ec2" on EC2.
Merge pull request #682 from opdemand/update-chef-admins

docs(chef): update for the new manage.opscode.com
Merge pull request #679 from opdemand/disable-registration

feat(controller): dynamically disable user registration
Merge pull request #653 from opdemand/makefile

feat(Makefile): let each project manage how it builds
Merge pull request #680 from opdemand/add-contributing

docs(standards): add commit style guide
fix(docs): add codeblock spacing

The format of the codeblock is incorrect.
Merge pull request #683 from opdemand/fix-docs-formatting

fix(docs): add codeblock spacing
use force yes to install required packages
Merge pull request #688 from clyphub/master

use --force-yes to install required packages
docs(contrib): Use Stove to cut cookbook release
Fix stove command
fix(providers): update dop calls

Before dop v0.1.6, the call to get all SSH keys listed on your
account was called all_ssh_keys(). In v0.1.6, they introduced a
couple of breaking changes, including the change to rename
all_ssh_keys() to ssh_keys().

ref: https://github.com/ahmontero/dop/blob/v1.6/dop/client.py#L196
fix(logger): change wildcard syntax

The wildcard syntax is incorrect. The proper syntax is ":omusrmsg:*". See
http://lists.adiscon.net/pipermail/rsyslog/2012-October/030846.html
fix(logger): unload psql module

This module is currently unused in the logger.

fixes #678
Merge pull request #691 from opdemand/fix-digitalocean

fix(providers): update dop calls
Merge pull request #690 from opdemand/carmstrong/contributing_docs_stove

docs(contrib): Use Stove to cut cookbook release
Merge pull request #693 from opdemand/fix-logger

fix(logger): fix wildcard syntax; unload psql module
docs(components): explain a container's filesystem

This explains that a container's filesystem is ephemeral, and
that any changes made to disk will be wiped when the container
is either stopped or restarted.
Updated CHANGELOG.md.
Updated CLI binaries and links in client README.