Added `debug.insertItem` to spawn item stacks into inventories in the world, closes #752.
Added assembler template filter system, closes #753.
Allows registering new filters via IMC. Providing default filter using new setting `misc.assemblerBlacklist` which is a list of item id + optional damage descriptors of the format 'itemid@damage', e.g. 'OpenComputers:case3' or 'minecraft:stonebrick@1'.