Merge pull request #6 from Supermathie/master

Enhance docker instructions
data begone
A couple of small updates following feedback. We make it even more
clear you have to install it into `/var/docker` and that the SSH
key should be the key itself as a string, not a filename.
FEATURE: hostname for instances so we can tell who is who
Properly quote root's key in the sshd hook
Merge pull request #11 from Supermathie/launcher_fixes

Properly quote root's key in the sshd hook
symlink public/backups directory
BUGFIX: tmp might not exist
make sure public schema is owned by discourse

we need to be owner of the public schema when restoring a backup
always update bundler during bootstrap
cache gems
Update README.md
fix deprecations
fix deprecation
fix deprecation
docker 0.9.0 fixes - ssh bust
base image upgrade pg 9.3 / ruby 451
Postgres upgraded from version 9.2 -> 9.3
fix holes in upgrade
Added SSL template
remove SPDY due to buffer overflow