Fixing accessor list to match updated JSON

JSON payload from /v2/lists endpoint has changed, but the accessor list
has not been updated to reflect this. Current calls to get_lists()
result in an "undefined method `created_date`" error.

(A similar change was just made to the CC Java SDK.)
Fixing ruby template examples

Incorrect iterator in example; need to loop over the results hash array.
Merge pull request #7 from mapalumbo/master

Update ContactList accessors.