Fixing minor best practices in the code

Hi @mvidaurre I just fixed some whitespaces and move a couple of lines to the Account model.
Since in accounts_controller.rb you are validating if account is valid I moved these two lines
```
  @account.create_schema
  @account.ensure_authentication_token!
```
to create_with_owner
```
    def self.create_with_owner(params={})
      account = new(params)
      if account.save
        account.users << account.owner
        account.create_schema
        account.ensure_authentication_token!
      end
      account
    end
```

There are a few methods not used, but I'm not sure about it. Take a look at the screenshot
![screen shot 2013-07-14 at 10 25 08 am](https://f.cloud.github.com/assets/216166/794421/1ce97fd2-ec9a-11e2-9d32-42a8066229c1.png)