add docs

src/main/java/mc/core/network/proto_125/netty/PacketHandler.java

@@ -2,6 +2,25 @@
  * DmitriyMX <dimon550@gmail.com>
  * 2018-04-10
  */
+
+/*
+http://wiki.vg/index.php?title=Protocol_FAQ&oldid=76
+-- -- --
+C - Client
+S - Server
+-- -- --
+C -> S : Connects
+C -> S : Sends handshake
+S -> C : Sends handshake response
+C -> S : After authenticating (if needed), sends the login packet
+S -> C : Either kicks (invalid login) or sends a login response
+S -> C : Sends pre-chunks and chunks and entities
+S -> C : Sends spawn position
+S -> C : Sends inventory [Need to verify this since inventory changed] (beta 1.1_02: looks like Window items with type=0, then a Set slot with window id = -1 and slot = -1)
+S -> C : Tell the client they're ready to spawn by sending a position + look packet. Note: The stance and Y should be swapped when the server sends it to the client
+C -> S : Sends a position + look packet to confirm the spawn position, with the stance and Y swapped back to the correct positions
+*/
+
 package mc.core.network.proto_125.netty;
 
 import io.netty.channel.Channel;