Fix packet parsing

[mrfishie]

The packet parser has a tendancy to incorrectly think that there are two packets in one because of the way Node's buffers work. As a result it sometimes triggers the 'setWarp' packet when a 'ready' packet is received, which throws an error as the packet length is incorrect. Currently a simple hack in the 'setWarp' packet is being used, however this will need to be fixed in order to use it.