There's a part of me that would love to see this spat out ready formed for dropping into a Chimpdoc config block:

````ruby
Chimpdoc.config do |c|
  c.storage(:dropbox) do |s|
  s.app = {
    :key => 'xxxxx',
    :secret => 'xxxxx'
  }
  s.token = {
    :key => 'xxxxx',
    :secret => 'xxxxx'
  }
end