GooeyLibs

Changes:

• Added all convenience methods from template builders to templates themselves.

        This should make template updates after initialization easier and cleaner.

• Added a clear method to all template implementations.

        This removes all buttons from the template.

• Made fill method behavior consistent among all templates.

        Fills all slots that are currently empty.

• Added convenience methods to relevant templates for making layouts from lists of buttons.

        These methods are appended with fromList. For example, ChestTemplate#row -> ChestTemplate#rowFromList.

• Added InventoryHelper to assist in making player inventory changes that reflect in Pages.
• Added more context methods to ButtonAction to see if slot clicked is in player inventory, and getting the clicked slot in inventory template.