first three

I'm using the same ratio of non-diamond<>diamond as the katana.
last two

I also fixed the colors on some of them.
Boosts fire trail effect of napalm ammunition.

Compared to normal gasoline, the !one_in(3) has been replaced by a
!one_in(4) and the field strength is 2-3 instead of 1-2.
Documenting new flag.
recipes

Added recipes, plus fixed some stuff.
balanced recipes

The times are based on [(volume)*20000]+200000 which seemed to be what
the other three recipes followed.
fixed comma

Thanks Mr. Bot, I found it.
knocked down difficulty
Small mapgen fix
Field limiting.

Guarantees level two fire field.
Merge branch 'napalm-boost' of https://github.com/Rivet-the-Zombie/Cataclysm-DDA into merge2
Merge branch 'more-diamond-blades' of https://github.com/TheFlame52/Cataclysm-DDA into merge2
Merge branch 'mapgen' of https://github.com/Mshock777/Cataclysm-DDA into merge2
Fix pricing, proofread.