0.0.4

CHANGES:

• Introduce Handler Switching – this lets a handler, at any point during the
  lifecycle, switch to a new handler and reinitizialize the connection.

  This is particularly useful for protocol upgrades such as going from HTTP/1.1
  to HTTP/2 or WebSockets.

• Introduce protocol negotiation to support SSL socket pools in Riot 0.0.8

• Expose a direct Connection.receive and allow reading an exact number of
  bytes from a connection (useful for sniffing)

• Introduce and update benchmarks in Go, Elixir, Erlang, Eio, and Rust

• Refactor Transport/Socket interfaces to reuse buffers

• Add echo_test to verify integrity of data

• Add working TCP echo server example

• Upgrade to Riot 0.0.7