Created contrib/recipes
updated footer formatting
fixed spelling mistake
Separate minion controller from master.
Separated user, dev, and design docs.

Renamed: logging.md -> devel/logging.m
Renamed: access.md -> design/access.md
Renamed: identifiers.md -> design/identifiers.md
Renamed:    labels.md -> design/labels.md
Renamed:    namespaces.md -> design/namespaces.md
Renamed:    security.md -> design/security.md
Renamed:    networking.md -> design/networking.md

Added abbreviated user user-focused document in place of most moved docs.

Added docs/README.md explains how docs are organized.
Added short, user-oriented documentation on labels
Added a glossary.
Fixed up some links.
Merge pull request #1851 from erictune/dev_doc

Separate design and user docs
Merge pull request #2084 from jeefy/master

Community Recipes section
Add a link to the contrib/recipes directory.
Fix a flaky test by draining the worker pool after syncing.
Merge pull request #2096 from brendandburns/master

Fix a flaky test by draining the worker pool after syncing.
Merge pull request #1997 from ddysher/split-master

Separate minion controller from master.
Add basic Authorization.

Added basic interface for authorizer implementations.
Added default "authorize everything" and "authorize nothing
implementations.
Added authorization check immediately after authentication check.
Added an integration test of authorization at the HTTP level of
abstraction.
Merge pull request #1847 from erictune/authz

Add basic authorization.