Added new features related to the spawn and to the player death.
In this update I added the /back command that allow a player to teleport to his last death location stored in his config file (players/playerUUID.yml).

Settings:
spawnOnDie:
When a player die they will be teleported to spawn. Default true.

spawnOverrideBedSpawn:
If set to false, players that have a bed will appear at spawn. if set to false, it will be teleported to their bed if they have one. Default false.

spawnIfNoBed:
Players will be teleported to spawn if they don't have a bed when they die. Default true.

showDeathCoordinates:
Send a message to player to show their death location. Default true.

Permissions:
mysticessentials.back: Players with this permission can use /back command. Default op.