Feature/settings

feature/settings allows the admin to manage settings containing the copyright information, contact email, and about page text. Admin can add, edit, and delete this information from the admin index path.
What about something like...

```ruby
def self.default_settings
%w{Copyright Email About}
end

def self.create_defaults
  default_settings.each do |setting|
    self.where(:setting_name => setting).first_or_create
  end
end
```