Fertilizer Bomb & Fertilizer Improvements

-Added bags of dry commercial fertilizer.
     These are rather big and heavy, but more common than liquid fertilizer (farms, hardware & garden store).
-Added fertilizer bombs. Recipe uses a source of fertilizer with either sugar or gasoline.
     These are also larger and heavier than most explosives and must be lit.
-Added menu to allow choosing of which fertilizer to use when fertilizing a plot

I would be interested in thoughts on balance, changes to description etc. For example, finding one gallon jug of liquid fertilizer in a store has enough portions to fertilize 60 plots. I did not edit this, but currently I have a much larger and heavier bag of pellet fertilizer having only enough for 20 plots. Nerf it or buff the pellet form?
I think I changed them when I changed their item_groups. Sorry for not putting that in the changelog. I kept getting greater than 10% of hardware spawns spawning permanent markers. Considering that hardware store spawns contain a very large group of interesting items the markers were diluting out too many other things. It makes more sense for markers to get added in lower chance to other item groups than simply make it have such a high chance of spawning in hardware stores (which appear to be one of the only groups).

The needles thing just looked like a bug when I looked over farming_tools. Knitting needles spawning in both a gardening store of the middle of a barn doesn't seem to fit at all. The distaff could probably also make a change. I guess an old spindle & distaff could technically be found as an antique in the middle of a barn,but it sure wouldn't be found in a gardening store like it can be now. Either change the gardening store using that group or we should remove the distaff,