* move mc.ping to the bottom as it isn't the most important part of nmp
* add documentation about createServer options : fix#206
* add states, supportedVersions, createSerializer, createDeserializer
* 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
* put parsePacketData in deserializer and createPacketBuffer in serializer
* remove packets from the index and expose readPacket instead
* load packets when needed in various files
* make tests test every supported version
static cross version of #234, fix#65, fix#240
