change home path to $DOKKU_ROOT
change pws to pass
Fixed volume path

Volume path has been changed since Docker 0.6.7.
Dont rename volume, just hold reference
Merge branch 'pr/5'

* pr/5:
  Fixed volume path
Merge branch 'pr/4'

* pr/4:
  Remove cat at end of file

Conflicts:
	commands
Remove new line
Remove unused space
Set DATABASE_URL
Follow up docker 0.7.3 unsupport github syntax