Added spawner crafting - this allows server operators to create custom spawner recipes that players can craft in the /spawnercraft menu (more information in the crafting.yml file).
Moved price settings to a new prices.yml file.
Added new defined items in prices.yml file, where you can create custom items to use as prices, these items can only be obtained by the command /sl item or set to drop from a spawner when it fails to break.​

Fixed allow permissions for breaking, placing and stacking prioritising main (wildcard) permission check instead of per-entity permissions.
Fixed upgrade numbers on spawner items always showing as roman numerals.
Implemented spawner item upgrade value safety.
Fixed misspelled words in comments, tab completions and language file.​

Implemented code related to the new spawner crafting feature.
Implemented code for defined item prices.
Improved code readability.​