Bukkit

+ Added some advanced structure detection mechanics
+ Other plugins can now detect trees again via TreeFeller
* Updated mcMMO compatibility to newer mcMMO API
* Fixed mcMMO Double drops not working (probably)
* Added a warning to the config that FALL_HURT behavior destroys items
* Fixed default debug messages for custom model data
* Fixed material set modify menu unable to open with null value
* clarified the function of max-logs in the config