* correctly generate the same uuidv3 than the vanilla server does in offline mode : fix#282
* remove "one player online mode" in the proxy : it doesn't make sense to identify all players as the user/passwd given in the cli. Now both servers in offline mode.
* move general datatypes to protodef along with their tests
* move states to states.js file
* use one protodef serializer by state and direction instead of one big serializer for everything (same thing for the deserializer)
* define a packet as a protodef type using a switch and a container, and adding each minecraft packet as a type (packet_ + name)
* use mapper type from protodef to convert id to name in packet definition
* use general string type : pstring
* divide by 10 the number of iteration in the benchmark to get back to a reasonable test execution time
