tin variety (trunk only)

tin variety (trunk only)

- store the variety of tin at tin creation time
  rather than at tin-opening time (as a negative
  value in spe just as homemade was; spinach
   is still spe 1)

Allow wishing for a particular variety of tin
from the tin variety list:
	"deep fried", "boiled","broiled","candied"
	"dried", "french fried", "homemade"
	"pickled", "pureed", "rotten", "sauteed"
	"smoked", "soup made from", "stir fried",
	"szechuan"
Example: "tin of soup made from orc"

non-debug player could randomly fail on the
variety specification 1 in 4 times