v2.6

- update to Bukkit 1.7.2-R0.3
- Spout interface disabled/removed
- Blackhole disabled
- suffocation fixed
- configuration changed, helmet now Material.string [GLASS]
- world ids handling changed, now based on worldnames
- world generator issue on planets fixed, workaround: set to stone if
null
- world generator test with multiworld
- world generator test with worldborder fill
- new command for set helmet