Summon Command

[smantic]

Adds a summon command to the vanilla command package. (to use you will have to register the vanilla commands with the command manager.

You can summon all mob entities, and some other misc entities. You can summon a mob in place or at a specified x,y,z position.

Usage: /summon [pos]

I also took the liberty to update the gradle wrapper to latest version, and added the jitpack.yml file to specify to use java 11 instead of the default of java 8. (so now we can finally use the vanilla reimplementation as a jitpack dependency).

[KrystilizeNevaDies]

Could you add the tilde syntax? etc /summon zombie ~2 ~ ~-5

[smantic]

this command now works with relative positioning. you can use ~ to indicate that you want to use your current coordinate for either the x, y, or z dimension. In game usage of the summon command.

This PR Is now dependent on the changes contained in this PR for the command builder module. https://github.com/TheMode/CommandBuilder/pull/1

[jglrxavpok]

Could you check that it still works with the latest changes to the command """lib""" ? (base package changed)