Misc updates

[ClaesNilsson]

• Removed the halfclose event, https://github.com/sysapps/raw-sockets/issues/39.
• Changed message/onMessage to data/onData for TCP, https://github.com/sysapps/raw-sockets/issues/41.
• Nagle algorithm/TCP_NODELAY, https://github.com/sysapps/raw-sockets/issues/40.
• Description of "loopback" attribute, https://github.com/sysapps/raw-sockets/issues/38.
• Binding a socket to a local port when it is not specifically specified, https://github.com/sysapps/raw-sockets/issues/37.
• Minor corrections in simplified examples 1 and 2 submitted by Marcos.
• Added example use cases to the Introduction section, https://github.com/sysapps/raw-sockets/issues/14.
• Added reference to DOM.

[marcoscaceres]

Finished review... few small things, but looks good to me.