cheat sheets.

Please keep this sheet clean and simple.   Long winded discussions should be in
cheat capistrano.

* multi-stage   (http://weblog.jamisbuck.org/2007/7/23/capistrano-multistage)
set :stages, %w(staging production testing) # [optional] defaults to
[development, test, staging?, production].
set :default_stage, "testing" # [optional] if omitted, cap aborts if you don't
specify in args
require 'capistrano/ext/multistage'

Stage-specific code: config/deploy/staging.rb, etc.