Continuation of Elwood's pemmican mod.

**Tested to work for v1.16.3

It adds pemmican which is made by pounding fruit, bushmeat and fat together with a couple rocks.  Any available fruit can be used (currants, blueberries, cranberries, saguaro fruit). Great for prepping a kill and turning it into compact food for the trip home or to prepare ahead of time for a long journey.  Pemmican is meant to be carried in densely packed bricks which must be broken into pieces before eating raw but the best nutrition comes from warming it first. 

Compacts into dense bricks of 6 meals for storage.  No more foraging during long journeys, and keeps for a very long time (same as salt-cured bushmeat).

**Saturation Values:
Using cooked bushmeat and 'normal' berry values (blue/currants), the total saturation for the base recipe is 480, split into 6 gives the 'raw' 
values of 80 per ball.  This is the same as if the player ate the ingredients individually, using the cooked bushmeat value (as there is no raw 
one).  There is a small 'boost' if the player uses cranberries or saguaro fruit (60 sat v. 80 sat), but they lose the health recovery from the 
saguaro fruit.  

The cooked version gives an overall boost to the saturation of the ingredients, to a total of 720, though this is still short of the value of an 
'equivalent' redmeat/poultry stew (using Mushrooms, as 2x are 240 total Sat, same as 3x fruit in the pemmican recipe):

2x Bushmeat + 3x Fruit = 480 total saturation (raw)
2x Bushmeat + 3x Fruit = 720 total saturation (cooked)
2x Redmeat + 2x Mushrooms = 1080 total saturation
2x Poultry + 2x Mushrooms = 990 total saturation

Even with the increased saturation value for the cooked pemmican, the meat stews are still offer more.  What this recipe offers is convenience 
when berries are available (and the player doesn't have a cooking vessel/redmeat), as well as a much longer shelflife for winter/etc storage 
(RL pemmican can last 1-5 years at room temperature, longer in colder climes).