Mem and Performance Improvements - #28

After sleeping for more than 4 hours I realized there were some major memory and performance improvement opportunities to be had, but would be breaking changes. Now's the time to do it before 3.0.0 goes out.

• where on CurrentPropertyList no longer eagerly allocates memory by forcing the results of the query into a List<>. Now returns an Iterable and is up to the caller to decide when to take that hit (if they need to at all).
• Bulk actions on lists such as clear, addAll, etc, will no longer always emit the previous list contents on the event stream. This could potentially be a huge improvement for large lists as the previous implementation always made a copy of the entire list and added it to the change event (who would do such a thing...). You can still opt-in if you were relying on the previous value, but now it's up to you to shoot your own foot and we won't shoot it for you.
• Optimized a change on a map or list where many items were altered in a single pass. Previously would send a ton of events, one for every item that changed (on huge lists this would be very costly), now will send a single change event.