Packets

Packets are classes which represent specific requests and responses, containing a packet id and any number of Objects.

Packets are generally encoded and decoded using Segments.

Constructors
encoder	Encodes some objects into packet data
decoder	Initialises a packet with packet data to be decoded

Important Methods
decode	Attempts to decode the packet. Returns true if there was enough data available and the packet was successfully decoded
handle	Handles the packet if it has been decoded (performs packet-specific functionality using the Objects decoded from the packet)

Constructors