Create protocolflow.md

Author: Duckxz

Diff for: protocolflow.md

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+This document describes the general flow of the protocol,
+ S is server, C is (all) client(s) and
+ \* means all clients including self
+
+# Map transfer
+```
+MapStart (S) -> C
+MapChunk (S) -> C (sent until all chunks sent, chunks are 1024*1024 bytes)
+ExistingPlayer (S) -> C (sends one for each connected or connecting(?) players)
+StateData (S) -> C
+```
+
+# Respawn
+```
+CreatePlayer (S) -> C*
+```
+
+# Team change
+```
+ChangeTeam (C) -> S
+KillAction (S) -> C*
+```
+
+# Weapon Change
+```
+ChangeWeapon (C) -> S
+KillAction (S) -> C*
+```
+
+# After StateData
+The StateData packet marks the end of the map and player transfer meaning it can be any of the other packets (mostly inputs and WorldUpdate)