Building display component

[DainDwarf]

Component for displaying a building and assigning workers/building more easily.

This should be compact, and clearly show how to build more, assign workers, the cost and benefits of the building. Not an easy task!
Also, there will be (or there already is) a spell for popping buildings. Maybe a way to upgrade buildings later? (different from unlocking next building lvl, both being part of the scientific branch)

Ideally, I want to be able to reuse that component for templates as well, but templates need a full redesign anyway. If it seems easy to integrate it, go for it. If not, don't.