DiabloLoot - Bosses Update

- Added "Common" config.

- Removed every numeric alteration comes from v2.3 since i thought it should be less hardcoded (Thanks to an user).

- Now you can manipulate all drop rates and the distance that's required to level mobs up. (There are limits ofc).

- Planning to add new mechanics instead of focusing on more abstract stuff (Each being able to mine and cut trees also going to be a DL mechanic? Who knows maybe :/).