SPacketEntity's inner classes aren't renamed

[ThisTestUser]

The classes still resemble what CPacketPlayer was like in 1.8. (e.g. S15PacketEntityRelMove)
So is it a good idea to rename those classes?
(My suggestion is to rename it like what CPacketPlayer does, with the "Position" and "Rotation" and such.)

[Pokechu22]

(ref for the CPacketPlayer thing: #231)

[bs2609]

As these are inner classes, they don't need another layer of SPacketEntity, they can just be:

RelMove
Look
LookMove

[kashike]

Updated.

[kashike]

• net/minecraft/network/play/server/SPacketEntity$S15PacketEntityRelMove → net/minecraft/network/play/server/SPacketEntity$RelMove
• net/minecraft/network/play/server/SPacketEntity$S16PacketEntityLook → net/minecraft/network/play/server/SPacketEntity$Look
• net/minecraft/network/play/server/SPacketEntity$S17PacketEntityLookMove → net/minecraft/network/play/server/SPacketEntity$Move