skin_packs.json formatting

{
  "schemaVersion": 1,
  "<namespace>:<packname>": {
    "icon": "<namespace>:textures/skin_packs/<packname>",
    "type": "(default|skin|mashup)",
    "skins": [
      {
        "model": "<namespace>:skinpacks/<packname>/<model1>.cpmmodel"
      },
      {
        "model": "<namespace>:skinpacks/<packname>/<model2>.cpmmodel"
      }
    ]
  },
  "<namespace>:<pack2>": {
    "icon": "<namespace>:textures/skin_packs/<pack2>",
    "type": "(default|skin|mashup)",
    "skins": [
      {
        "model": "<namespace>:skinpacks/<pack2>/<model1>.cpmmodel"
      },
      {
        "model": "<namespace>:skinpacks/<pack2>/<model2>.cpmmodel"
      }
    ]
  }
}