Bug fixes

• Tentative top ten bug fix.
• Stop lava fire spread if fire spread is disabled.
• Changed no-push code to not do anything if push is enabled.
• Changes to permission checking to improve compatibility with older permission plugins for island.maxhomes, team.maxsize & island.range.
• Removed worldLoader class that was clashing with PlotSquared and causing player files to be stored in the ASkyBlock world folder.
• Fixed an edge-case bug where an admin has changed the island height and a player did not have a nether island, and the player creates a nether portal at a point far away from the island center: then it could repeatedly regenerate nether islands when the player goes to the nether.