Ls/cleanse

Makes call to API to get friends list (limit=1000), and returns an array of VENUser objects. Cleanses JSON response right when it receives the JSON. Can only cleanse if it gets a dictionary, not an array, but can cleanse the array if it's within the dictionary.
I think the reason we went with an indexed loop was because we can't alter the elements in the array if we're doing a for-each loop.