initializes logger object, logs when deploying through heroku_platform_a...

initializes logger object, logs when deploying through heroku_platform_api
only provides organization key to options when a value is provided. Fixes problem deploying apps with no org

https://www.pivotaltracker.com/story/show/81297212
Could you just use...
```Ruby
@heroku_organization_name.blank?
```
here?