Implement /tp command

[jnwhiteh]

Here's the intercept log from a teleport:

 [1] 2011/07/19 12:38:02.868405 Client connected from 127.0.0.1:50833
 [1] 2011/07/19 12:38:02.868796 Creating relay to server localhost:25565
 [1] 2011/07/19 12:38:02.869464 Connected to server
 [1](C->S) 2011/07/19 12:38:02.883965 ServerReadHandshake(username=jnwhiteh)
 [1](S->C) 2011/07/19 12:38:02.897857 ClientReadHandshake(serverId=-)
 [1](C->S) 2011/07/19 12:38:02.984026 ServerReadLogin(username=jnwhiteh)
 [1](S->C) 2011/07/19 12:38:03.051187 PacketLogin(entityId=174, mapSeed=-5736179572911482094, dimension=0)
 [1](S->C) 2011/07/19 12:38:03.051257 PacketSpawnPosition(position=&{-76 64 -64})
 [1](S->C) 2011/07/19 12:38:03.079793 PacketPlayerPosition(position=&{-5.21875 70 -13.9375}, stance=71.62000000476837, onGround=false)
 [2] 2011/07/19 12:38:11.823310 Client connected from 127.0.0.1:50835
 [2] 2011/07/19 12:38:11.823354 Creating relay to server localhost:25565
 [2] 2011/07/19 12:38:11.823836 Connected to server
 [2](C->S) 2011/07/19 12:38:11.826380 ServerReadHandshake(username=rtomharper)
 [2](S->C) 2011/07/19 12:38:11.850724 ClientReadHandshake(serverId=-)
 [2](C->S) 2011/07/19 12:38:11.922615 ServerReadLogin(username=rtomharper)
 [2](S->C) 2011/07/19 12:38:11.954915 PacketLogin(entityId=175, mapSeed=-5736179572911482094, dimension=0)
 [2](S->C) 2011/07/19 12:38:11.954993 PacketSpawnPosition(position=&{-76 64 -64})
 [2](S->C) 2011/07/19 12:38:11.955057 PacketTime(time=9281)
 [2](S->C) 2011/07/19 12:38:11.955356 PacketNamedEntitySpawn(entityId=174, name="jnwhiteh", position=&{-167 2240 -446}, look=&{105 213}, currentItem=270)
 [2](S->C) 2011/07/19 12:38:11.967377 PacketPlayerPosition(position=&{-72.5 65 -60.5}, stance=66.62000000476837, onGround=false)
 [2](S->C) 2011/07/19 12:38:11.967458 PacketPlayerLook(look=&{1.2000003 0}, onGround=false)
 [1](S->C) 2011/07/19 12:38:12.000371 PacketChatMessage("§ertomharper joined the game.")
 [1](S->C) 2011/07/19 12:38:12.000434 PacketMapChunk(position=&{80 0 80}, size=&{15 127 15}, len(data)=2400)
 [1](S->C) 2011/07/19 12:38:12.000507 PacketNamedEntitySpawn(entityId=175, name="rtomharper", position=&{-2320 2080 -1936}, look=&{0 0}, currentItem=0)
 1](C->S) 2011/07/19 12:38:19.054021 PacketChatMessage("/tp rtomharper jnwhiteh")
 [1](S->C) 2011/07/19 12:38:19.102955 PacketEntityRelMove(entityId=175, movement=&{0 0 0})
 [1](S->C) 2011/07/19 12:38:19.103419 PacketMapChunk(position=&{-144 0 -128}, size=&{15 127 15}, len(data)=4571)
 [2](S->C) 2011/07/19 12:38:19.105091 PacketEntityRelMove(entityId=174, movement=&{0 0 0})
 [2](S->C) 2011/07/19 12:38:19.105154 PacketMapChunk(position=&{-112 0 16}, size=&{15 127 15}, len(data)=3208)
 [1](S->C) 2011/07/19 12:38:19.152335 PacketMapChunk(position=&{-144 0 -144}, size=&{15 127 15}, len(data)=4208)
 [2](S->C) 2011/07/19 12:38:19.152535 PacketMapChunk(position=&{-128 0 16}, size=&{15 127 15}, len(data)=3467)
 [1](S->C) 2011/07/19 12:38:19.200065 PacketEntityRelMove(entityId=175, movement=&{0 0 0})
 [1](S->C) 2011/07/19 12:38:19.200136 PacketMapChunk(position=&{-128 0 -144}, size=&{15 127 15}, len(data)=4166)
 [1](S->C) 2011/07/19 12:38:19.200223 PacketChatMessage("§7(jnwhiteh: Teleporting rtomharper to jnwhiteh.)")
 [2](S->C) 2011/07/19 12:38:19.201942 PacketPlayerPosition(position=&{-5.21875 70 -13.9375}, stance=71.62000000476837, onGround=false)
 [2](S->C) 2011/07/19 12:38:19.201990 PacketPlayerLook(look=&{-225.14928 -2.7000282}, onGround=false)
 [2](S->C) 2011/07/19 12:38:19.202023 PacketEntityRelMove(entityId=174, movement=&{0 0 0})
 [1](S->C) 2011/07/19 12:38:19.252388 PacketEntityTeleport(entityId=175, position=&{-167 2240 -446}, look=&{95 254})