Rename Server to StreamingServer and add new Server facade with sane defaults #259

Most clients should not have to care about concepts such as "streaming", "buffering" and "parsing". In particular, most of our examples completely ignore this fact. As such, it makes more sense to add a new Server that takes care of all this for the 80% use case. We will likely rename our current Server implementation to something like StreamingServer and implement a simple facade that uses our RequestBodyBufferMiddleware and RequestBodyParserMiddleware.

Refs #197 and #198