Ensure there is a newline after calling `set -e`
Use 2 spaces for formatting bash

Also remove extra trailing newlines
Add `set -eo` statement to nginx-vhosts/dependencies
Update dokku-installer version to v0.3.0
Standardize installer on 2 spaces
Add editorconfig to dokku

This should help dokku contributors force proper formatting on their contributions
Merge pull request #760 from progrium/formatting

Formatting