Merge pull request #22 from Supermathie/master

Add support for detecting & pulling in DSA key
Enhanced user experience

* launcher: add test: docker daemon running?
* launcher: bugfix: double-quotes were getting into SSH_PUB_KEY variable
* samples: add comments to port specs, email, smtp settings, etc
* samples: add run block with examples for root password, ssh key import
Merge pull request #23 from Supermathie/userfriendly

Enhanced user experience
Add examples to bind to only one network interface

Add `- "127.0.0.1:20080:80"` to `expose` example as well as the full docker port binding syntax.
Merge pull request #24 from alexdong/patch-1

Add examples to bind to only one network interface
FEATURE: ability to run old PG if needed
Second upgrade method if primary fails
Added web hook
Fixed syntax error
Update README.md
oops
Added a rebuild command to simplify rebuilding containers
Add rsyslog to cron.template
Merge pull request #27 from Supermathie/rsyslog

Add rsyslog to cron.template
Update standalone.yml
Update base image to 0.2.0

* add -updates repository
* add rsyslog
* use caching proxy during build if present
* much resilient!
Merge pull request #28 from Supermathie/update-020

Update base image to 0.2.0
UPGRADE: docker 0.10 is now out
BUGFIX: No more heartbleed

updated base image
Adds new command line option to skip pre-requisites. This was causing
discourse-droplet to hang.
We can have more than 2 arguments now
Work around 'docker run' waiting for input

* https://github.com/dotcloud/docker/issues/5185