Updated plugin to 0.15.2

1. Improving handshake, so it will actually check the returned packet
code (Byte 1 = 3, Byte 2 = 1, Byte 3 = 4)
2. Change the packet IDs, packets sent from the plugin will have ID
starting from 1 (Vessel data) and packets sent to the plugin will have
ID starting from 101 (Control Packet)