Small spelling error fixes

Closes #1853 by changing all instances of, "oepn_sarcophogus" with "open_sarcophogus",
thereby fixing the typo.
Small correction to 'Survival' skill description

Closes #1751

Specifically removes the line about being able to 'clean' tainted meat
when you have a high survival skill, due to the fact that this is not
true. Easier (and frankly, makes more sense) to correct that small
detail than it is to add in a system of cleaning the tainted meat due
to it. If anyone does so, feel free to re-add the line, as it is only
a tiny change.
Allows the Integrated Toolset to be used in a few newer crafting recipes

Fixes #1734

Specifically, adds it as an available tool in the chainsaw recipe, as well
as the three crossbow recipes to replace common tools.
Small fix to last commit

Specifically, forgot a few commas that led to syntax errors. My fault,
but fixed up in this small commit.
Added primitive_hammer as a possible tool for certain recipes

Recipes altered: stone hammer, brazier, metal tank, crowbar. Each of these
were capable of being built already by a regular 'hammer' object or by a
'rock'. As a result, the rock hammer (primitive_hammer) is completely reasonable
to be a possible tool as well.