Add JSON streaming parser to DataMapper/ViewClient

Update the DataMapper/ViewClient so that each View row gets processed and returned to the user so that the client does not have to maintain a large buffer for response etc. The Java 2.0 SDK can be used as an example, although it likely will be a quite different implementation perhaps using IQueryable (deferred execution), TAP and/or TPL data flow.

Currently, the client streams the entire response into a buffer, then de-serializes the entire buffer into a list of objects and then returns that list. While very fast with small response bodies, performance quickly degrades with large response sizes causing latancy, high MEM, and CPU.