Add 'stored value name' and 'searchable' option to Message screens

On the dialogue (survey) creator screen we need to add the option for users to select whether the question should appear in search results (i.e. saved as extras in contacts) and we need to add a field where the user defines what the actual answer to the question will be stored as in the DB. 

See screenshot and let me know what questions you may have.
![screen shot 2013-07-19 at 4 41 44 pm](https://f.cloud.github.com/assets/1521387/826387/5c736508-f084-11e2-9739-565501ff84d6.png)