Documentation corrections
Documentation corrections

Base:1.4 stopped being index with v2.3.0
GenericMesh:1.6 is an int, not a long
GenericMesh:4.1 and :4.2 are 8 bytes, not strings
PlayerShip:nebulaType can have values other than 0-4.

artemis-nerds/protocol-docs,artemis-nerds/protocol-docs