Ability to exclude specific skins

I'm considering using this plugin, but I have a very specific need to exclude skins so that they aren't used on crafting. Could you add something like this to the config? 

  "SkinsExcluded": {
    "SkinList": [
      957116556,
      1681812191
    ]
  },​

Please consider using the same formatting of the skin list. This is what Skinbox uses and it would be much easier to be able to copy the list back and forth instead of having to surround in quotes (or anything like that). My list of excluded skins is very long and it would create a time consuming challenge.

Thanks!
That ability will be added