don't need this ID
Falsy statement in installation guide.

It says:
"Almost done! For next steps on configuration:
  https://github.com/progrium/dokku#configuring"
after bootstrapping..
Merge pull request #290 from Jeewes/patch-1

Deprecated statement in installation guide.
extract deploy mechanism into a plugin
added nginx port control commands
Merge branches 'nginx-ports' and 'config'