Paint's Flexible Recipes

On 1st February 2020, this datapack was updated again to 1.15.2 with the following changes:

* Fixed inventory_changed advancement, so all recipes should properly give now.

* Replaced blank minecraft recipes with vaild recipes (9 air = 1 air) so they won't cause errors.

* give_all_recipes function will take these air recipes so they won't show up in recipe books.

* Vanilla recipe-giving advancements have been made impossible for the same reason.

* Changed composter recipes to reflect change to composter recipe in 1.15.

* Changed barrel recipes to not conflict with new composter recipes.