converted planets and players to entities

add planetary constants

fixed movement again

fix

merged

Merge branch 'feat/tokio-sucks' into 'master'

screw tokio

See merge request starkingdoms.tk/starkingdoms.tk!3

satisfy terra and alador

marge feat/tokio-sucks

input support

Merge branch 'feat/protobuf-protocol' into 'master'

Rewrite the protocol to use protobuf

See merge request starkingdoms.tk/starkingdoms.tk!1

translate server to protobuf protocol

adjust gravity and remove temp logging in renderer

core module bounding box fix

resolve merge conflict

yay fancy planet code, but not tested :(

other players added, we'll see if it works

earth theoretically implemented

adding player is pain

yay broken, player initialization

update frontend