Update post-deploy to use $DOKKU_ROOT, 

`$DOKKU_ROOT` instead of hardcoding `/home/git/`
use more common nginx reload syntax

from dokku
Merge pull request #1 from audionerd/patch-1

Allow use when home isn't `/home/git/`
Updated plugin from my old dokku pull request
(https://github.com/progrium/dokku/pull/267). Also, updated plugin to
reflect new changes in the current nginx-vhosts plugin that is included
with dokku.
Readme .template -> .tpl [ci skip]
Merge pull request #6 from glebm/readme

Readme .template -> .tpl [ci skip]
Minor README.md fixes.
Source app env on post-deploy

Refs #5 #7
Merge pull request #8 from glebm/post-deploy-env

Source app env on post-deploy
Prevent source command from failing if `ENV` does not exist.
Clarified features.
missing 's' in nginx-vhost(s)

sudo rm -r /var/lib/dokku/plugins/nginx-vhost
rm: cannot remove ‘/var/lib/dokku/plugins/nginx-vhost’: No such file or directory
Merge pull request #10 from pyoner/patch-1

missing 's' in nginx-vhost(s)
Add the Subject Alternative Name extension

Include a uniq list of DNS names including the Subject Alternative Name
extension as certs often includes common associations like base domain
and www + base domain
missing 's' in nginx-vhost(s)

sudo rm -r /var/lib/dokku/plugins/nginx-vhost
rm: cannot remove ‘/var/lib/dokku/plugins/nginx-vhost’: No such file or directory
rename nginx-vhosts instead of deleting. update readme
rm backup if we find ourselves with another nginx-vhosts copy
Updated install to use existing plugin's install routines.
Merge pull request #15 from clarkbw/master

Add the Subject Alternative Name extension
Updated install instructions to reflect new install script.