Clothcraft adjustments for leather/fur completed

[Sami]

Working on clothcraft continues, and by now all the leather and fur clothes have been made pausable and checked for their time requirements.
To give you an impression about how time-consuming making of clothes will become, here are few pieces of garments with their average production times:
* fur mittens, 6 hours
* fur shirt, 22 hours
* leather boots, 20 hours
* leather shirt, 18 hours

And yes, making leather boots is a new addition to leather clothes.

Moreover, we'll be also adding increased skill gain probability for challenging time-consuming crafts so that complex items that take more than 10 hours to complete will now grant skill increases much more reliably. At lower mastery levels, you will gain skill almost every time you finish crafting such an item. This was primarily added to reflect the idea that creating complex garments (such as shirts or trousers) will most likely teach you something new. However, the system applies to all time-consuming challenging crafts. The more probable skill increases can be easily noticed for example when making proper bows (BOWYER skill), pair of skis (CARPENTRY skill), or a fishing net (NETMAKING skill).

Next, we'll proceed to making/utilizing fabrics. However, it may be that before the fabrics actually appear in the game we'll need to release an intermediate all-pausable clothcrafting version. This is yet to be decided, but I'll be keep you updated.

These are future features - not yet functional in current version 3.87