Feature/column module

This is the column part of this module https://www.pivotaltracker.com/n/projects/911872/stories/77974996

To start with we have a generic column module that lets you pin the collection length to a max-bars attribute.

After that we'll create a applications module that lets you set a target so we can begin making calculations based on that.
Agreed this is bad. I'll change it to something that's obviously not what we want so it makes us implement it in the config.