Rename 3 spec fields of CurrencyItems.dat

[shirohana]

Renamed three fields of CurrencyItems.dat:

Directions -> Description
Description -> Usage
XBoxDirections -> XBoxDescription

I think it is more approched to the scenario, here's some sample (unimportant fields removed):

CurrencyItems.json

{
  "BaseItemTypesKey": 6617,
  "Stacks": 1,
  "CurrencyUseType": 3,
  "Directions": "Can be used in a personal Map Device to add modifiers to a Map.",
  "Description": "Area contains Metamorph Monsters\r\nMetamorph Bosses which drop an Itemised Sample drop two additional Itemised Samples\r\nAll Metamorph Monsters have Rewards",
  "XBoxDirections": "Can be used in a personal Map Device to add modifiers to a Map."
}

CurrencyItems.json

{
  "BaseItemTypesKey": 6618,
  "Stacks": 10,
  "CurrencyUseType": 3,
  "Directions": "Can be combined with other Oils at Cassia to Enchant Rings or Amulets, or to modify Blighted Maps.",
  "Description": "",
  "XBoxDirections": ""
}

[shirohana]

Oh my god, I read the descriptions in other translations (Traditional Chinese), but it looks correct in English...

That's my bad, I have no double checked in English, close now... sorry for distrubed.