Tentacle upgrade

These implement the leg tentacles as Logrin requested, and adds a damage
upgrade to the tentacle attacks.  Both are post-Threshold for
Cephalopod.
Digestive foundations

If you're gonna bite off a hunk of zed and swallow it, helps to be able
to eat poisonous food.
Footgear check

As NaturesWitness requested.
Start with Albino

As requested on the forums:
http://smf.cataclysmdda.com/index.php?topic=5036.0

This makes Albino available at start, nerfs it to Pain rather than HP
damage, and includes protective gear folks can wear to prevent problems.

Later mutation does HP damage along with pain.
Tweak effects

Albino's not so bad--but again, you're wearing heavy gear or taking the
effects, and I bumped the incidence to 1/10 from 1/20...
leg tentacle syntax cleanup

Just makes an ugly halting sentence much more palatable.  Fixes
dwarfkoala's in the process, too!
Vines

Plant needed some love.  There it goes.
Adds Saber Teeth & Hypermetabolism

One makes one's teeth get Way Too Large and the other gives Chimeras a
pretty good healing ability post-Threshold.

Got another waiting for when swwu decides to actually make Creature
coextensive with Monster.  Currently no flags or materials in Creature,
so far as I can tell.
saberteeth tweak

Adds the downsides.  Got tied up trying to get EATCOMBAT to work.
Threshold-breach notes

Adds memlog notes and changes the character's profession on Threshold
breach.
More Troglobite stuff

Get digging!
Merge pull request #5547 from KA101/there-must-be-more-mutations

Yet more mutations