Integrate ES6 Proxies into gooey.Service.data and gooey.Service.publish

[slurmulon]

http://www.2ality.com/2014/12/es6-proxies.html

Ensure data is a Proxy object that integrates proxy event handlers into gooey.Service.publish

This will be useful as it is a native abstraction for intercepting property requests on objects. This will allow us to more easily support model/view two-way data synchronization.

• If data is a proxy, concurrent Service subscription handlers will be able to more easily synchronize data mutation events (order specification, conflict resolution fn, etc.), especially those between sibling Services that are mutating identical data points.
• This is easier on the developer because we can trigger native events when data is mutated, and therefore we can trigger a recursive publication of that data change. can provide a "weight" heuristic to automatically resolve any remaining conflicts

[slurmulon]

This will also help alleviate certain concurrency issues