v0.2.4

• Fix Socket::connect_timeout on Windows to return the socket in blocking rather than nonblocking mode.
• Fix Socket::connect_timeout on Linux to correctly handle refused connections.
• Add constructors for Protocol.

v0.2.2

• Fix set_read_timeout and set_write_timeout.
• Add Socket::pair under the pair feature.
• Add Unix socket support under the unix feature.

v0.2.0

• Add Socket::connect_timeout.
• Add a SockAddr type used instead of the standard library SocketAddr. This allows use of non-IP sockets.