Create band

This PR adds a couple of things:

* Foundation framework
* A dumb root page to see the basic layout
* Ability to create a band, which also creates a membership (the association of a band with a user), to set a role. When the current user functionality is available, we will modify this to use it.
* Some mock band index and show views.

There is a very primitive styling and markup, this is to get the basic stuff done to build on it