Admin can create new users

[jtu0]

This issue builds on the devise work done in #76

We need a way for new users to be created through the app. This should be as lightweight and minimal as possible. There is no guarantee we can send email reliably, otherwise devise-invitable would be a good choice.

• Add administrate to Gemfile, bundle
• Create a User-admin dashboard: rails generate administrate:dashboard
  • You might need to create a user model
  • users table was already created in PR 76
  • If you need to create the user model, it should include name and email. Devise will probably want password and maybe some other stuff.
  • Make sure you can still login with the test user (from db/seed)

Confirm that you can do the following:

• Can login and logout with the test user from db/seed

As an authenticated user:

• Can create a new user and supply a name and email
• Can delete a user

Don't worry too much about roles - do whatever is simplest and least code. If that means everyone is an admin, start there.

Please pop into the #abalone channel in rubyforgood.slack.com if you have any questions or want to grab this issue.

[benreyn]

@CraigJZ to break this into multiple user stories

[CraigJZ]

Separate issues added the tasks involved in completing this issue. Closing.