Deleted the def encounter_type that was included in the plugin. It was exactly the same as the def encounter_type that came with Essentials and was unnecessary.
Fixed a slight oversight with the random number generator that is compared to the weather probability. Now it shouldn't be possible for it to get a number so high that all probability checks fail.
Fixed a flaw in the code that selected the weather. Now it should compare the probability to a fixed number instead of randomly generating a new number for each weather probability.