/
Added two new options :
You can change the drop-interval, the time in minutes between the item drops, default is two minutes.
You can change the drop-count, the number of different items given every time (not the number of stacks given), default is one.
Both can be changed in the config.yml file
Some fixes when playing alone (it's better for testing lol)

Random Item Challenge. Get stacks of a random item every two minutes, fight your friends...