RC-276 Not all measures are being saved in measure selection

This was due to the JSON path treating the ID as an Integer and not a string, it was getting cast and then rounded off weird.
RC-278 Clicking on "approve ad units" multiple times resulted in multiple measures

Fixed logic on when to add measures.

The existing measures will need to be cleaned up manually.
RC 278 -- more fixes :p
Minor new feature for data service