Adds a newsletter subscription which is connected with Campaign Monitor.
- fastercsv
- campaigning
- soap4r
- jeweler
- haml
It access the SOAP API of [Campaign Monitor](http://www.campaignmonitor.com/ ,"Campaign Monitor") through the campaigning gem.
In the admin back end go to the configuration page. And choose Campaign Monitor. There you must add one Campaign Monitor. To do that you must define a name, best practice is to use the clients name, the API key and the client key.