add .ruby-version to project
Merge pull request #1 from Switchyards/add_ruby_version

add .ruby-version to project
create campaigns, add specs, factory
Merge pull request #2 from Switchyards/create_campaigns

create campaigns, add specs, factory
subdomain validations

- require subdomain to be 3 characters or greater
- add disallowed subdomain array
- ensure subdomain is unique (Rails validation and DB unique index)
Merge pull request #3 from Switchyards/make_sure_subdomain_is_unique

subdomain validations
Create Users model

- Use devise via omni auth to authenticate
- Log in via facebook link with omniauth.
- Generate a JWT API key.