Reforestation

v1.3.0
Placing requirements now come from each block's class instead of being the same as a sapling's.
The thread delay value now works when you change it in the config.
Uses an array for saplings types instead of a list for faster access.
v1.2.3
Actually fixed a major replanting issue.
v1.2.2
Fixed a major replanting issue.
v1.2.1
Added a configurable thread delay.
Fixed a few memory leaks.
v1.1.0
Added Plugin Metrics support.
v1.0.1
Fixed a stacking bug.