Merge pull request #781 from expa/master

use DOKKU_IMAGE (i.e. progrium/buildstep)
Release 0.3.4
Fix NO_VHOST check

It used to check if NO_VHOST is unset or set to the empty string
It now checks if NO_VHOST is set to a non-empty string
Merge pull request #784 from progrium/no-vhost-hotfix

Fix NO_VHOST check
Release 0.3.5
fix missing semicolon in nginx config
Merge pull request #785 from lsde/master

fix missing semicolon in nginx config
Merge pull request #4 from progrium/master

0.3.5