[NWorld] Do not teleport EnderDragons through portals. May fix #102
Also stop handling Stock worlds, Bukkit does stuff itself.
[Global] Force use of version number as defined in maven replacer plugin
[NCore] Implement Updater. Adds #55, #61 and #62
[NWorld] Differentiate hidden/not hidden worlds/warps in listing commands. Adds #111
[Global] Update minimal required Core version in all Nodes