Ditch junk swap files from vim that I accidentally committed
Add name to user
Bundle shoulda matchers
Add shoulda matchers to spec helper
Add columns for adding admin to membership

so that a user may be the admin or head admin for a household
README update
update schema
Validations and specs for membership

* Validate that there can be only 1 head admin per household
* Validate that a given user can be a member of a household only once
Add functionality to household to manage members and admins