Add support for ziplinks

[ldilley]

After adding support for server-to-server communication, add ziplink support. This can be achieved by the following example:

@require 'zlib'

some_str = Zlib::Deflate.deflate("hello world!")
puts some_str
puts Zlib::Inflate.inflate(some_str)@

So, just need to call Network.send(socket, compressed_data) from the sending server and the server on the receiving end will call the deflate method on the received data to get the original message.