[MWR] IV mutagen insertion

As discussed at #4876 and expecting Savidiy's fix at #4880 (didn't want to cause a merge conflict.  Thanks though, Savidiy!).

These add IV mutagens to the Lab chem rooms; each is comparatively rare but the amount of them should make the odds of one or two reasonable.  I intentionally made Fish more common because there's no renewable way to
make it: you need canned goods. 

Also makes flavored mutagens recipe-locked (so, major Nerf) and includes recipe books for all of them, which tend to spawn in relevant lab rooms. But if you find one on a scicorpse, that's not a bug.  Check the item ID.  :-)

Adds lab notes to the computers to keep the backstory-support going.

Fixes http://smf.cataclysmdda.com/index.php?topic=4654.0 by moving mutagen's demands on your system to the iuse entry.  Discussion with @EkarusRyndren led to my adding Fatigue hits and increasing the dings on hunger/thirst.  He also reminded me of the poppy-knockout effect, which has found its way into things.

Here's hoping you like these as much as I do--if not more!