JSON Recipe Edit

Bugfix:

* Fixed caching issue on Virtual Command Chains (caused some invalid states when you leave one world and create another in single player)

Format Change:

* delete recipe/furnace - now take one argument item in the standard json array format ["item","meta"]

(note if you are still passing in a string with an optional meta field, the original format, the script will work but a warning will be printed.)

The json schema also will not "validate" your script if you are validating your packs json (highly recommended) 

Features (New Commands):

* add fuel item - make an item usable in the furnace (and specify a burntime) can also be used to make existing items burn longer.

* edit block - edit various parameters of a block

* edit item - edit various parameters of an item

* batch update - currently two bulk update commands for item (tool) damage values, and stack size

Details will be added to the wiki soon, otherwise check the schema for all details of the json script format