Added Vagrant configuration. Run `vagrant up` to get started.
Added an example index.js with new middle layer.
Merge branch 'add-vagrant' into replace-dagre-d3
Fixed it.
Move functionality into main library.
Replaced all of dagre-d3 and grid-d3.
Two-step rendering process to account for node widths.
Make use of existing styles and dagre-d3 features.
Zooming works.
Code gardening and documentation.
Node appearance can now be a plugin.
API now consists of addResource and defineConcept.
Add classes to node groups for concepts and resources.
Add buns only to resources. Just for show.
Get Vagrant out of the way until you ask for it.
Fix top burger buns.
Add zoom and zoom setup callbacks.
Don't check for being held everywhere.
Fix text replacement bug.
New callbacks for layout.