Essentials [Warps, jails and so on]

[NiLSPACE]

In the beginning Core was supposed to only have the vanilla commands I believe, and I think that would make allot of sense ^^

If you could clean up the source code by adding some comments, and change all the indentations to tabs I see no problem in having it in the MCServer repo. I would even like to make the warps and jails use SQLite (With my SQLiteHandler class if nobody has a problem with that)