v5.0.0

Major overhaul to API to hide 90% of it since the vast majority of it was internal code unnecessary for consumers. Most of the hiding was accomplished by consolidating packages and then updating many classes and methods to use Java package visibility. The API is now much simplified and the classes such as QueryParams and QueryService are now internal only. Also, the concrete EventStream class implementations are now internal only as well. Prior to this release pretty much every class and every method was public. Now the API surface area for general consumption is much reduced.