Combine duplicate tentacles stocking recipes

Originally there are 4 recipes, 2 for stocking and 2 for sleeve. This PR combine 2 duplicate recipes, so now there is only 1 for each.
I also adjusted the stats (number of rags needed, tools' charges and time) to be for consistence with the stocking recipe.

Also in this PR is a re-balance of the blanket, right now it's too easy to make one and blanket is a highly sought-after item, especially for the no-city kind of character.

*Discussion: Ideally the game should have support for "dynamic" recipe - the time (and components possibly) for one particular recipe may change depend on what tool or what component you decided to use. So a makeshift tool will accomplish the task (crafting) much slower than a professionally-made one and maybe cost more component/charges too. This way we can have multiple ways (efficient or not) to make one thing, while at the same time avoid the need to create (nearly) duplicate recipe.