Docs for 0.0.1

This is a squash of 17 commits:

* docs: Initial introduction and getting started
* Moar docs
* A bit more docs
* Update introduction.md
* Update getting-started.md
* Update project status
* More work on docs
* Add link to docker issues / PRs related to user namespaces
* docs: Note that Im testing it on Docker 1.0.1+
* docs: A couple tweaks to the home page
* Update README
* docs: Mention `rake db:create db:migrate` on discourse example so that I dont forget it when recording the video
* Puma default port is 9292
* docs: `--standalone` is not a real flag
* docs: Sidekiq changed `rake spec` to `rake test`
* docs: Getting close to enough docs for v0.0.1
* Done with docs for v0.0.1
Merge pull request #45 from fgrehm/docs

Docs for 0.0.1