Version 1.7: Debugging, Tree stumps, and multiplied items
+ Added `/treefeller debug` for debugging assistance (requires permission treefeller.debug)
+ Added an option to leave the stumps of trees that are felled
+ Added an option to reduce (or increase) the drops of trees' leaves or logs
* Cleaned up the code a bit
* Fixed saplings not replanting when spawn-saplings was set to 2