Is your feature request related to a problem? Please describe.
There is alot of items that are added by Ice and Fire, and I think it would be a good idea to add them to the Forestry Backpacks.

Describe the solution you'd like
Simply editing the config\forestry\backpacks.cfg
I even went and did it for ya'h~
(Posted it there as it is very long)

Additional context
Add any other context or screenshots about the feature request here.

Nice work!