This hopefully makes it a little easier to work with as the tooling is now based on something in golang core.
- move columnize usage to common plugin
- remove old vendor files
Global limits make it harder to reason about the inheritance in the system. Rather than support global limits, Dokku should provide primitives to automatically set them on an app at provision time, or explicitly set them for an app. Both of these are likely best suited for a higher-level provisioner, or a community plugin.
