Added a somewhat naive implementation of array deduping by loading the elements into an object map as keys.  Naive in that it will fail if the value in the array can't be used as an object property name.
Added a somewhat naive implementation of array deduping by loading the elements into an object map as keys.  Naive in that it will fail if the value in the array can't be used as an object property name.

nathanaschbacher/nodiak