[CR/Ready] Mutations: The Next Generation

Freeze is gone.  Time to do what I do.

Leading off with unifying the various mutagenic substances: now if you mutate via substances (as opposed to radiation) you take the hunger/thirst/fatigue/pain hit, and added "MUTAGEN_WEAK" for non-mutagen mutagenics like the legs, arms, tainted tornado, etc.

Got a nice selection up for the Slime folks post-Threshold, including a practically-Capstone mutation to let you spawn smaller Slimes (unique critter and special!).  Insect & Spider some post-Threshold love, and then Bird next.

Was Unfun and moved HIBERNATE past the Ursine threshold.  Sorry.

Finally got that knot out of my spinnerets there.  More Web love for Spiders, though I did Threshold-lock Web Weaver.  Hoping to get the legs working by this time tomorrow.  (Preferably sooner.)

Legs operational; I tightened the requirements for AMORPHOUS' bar-slip to torso/head/feet not-encumbered.  Will bring back PROBOSCIS for the Insects now that flowers are actually available in respectable quantities and then Birds need attention.

PROBOSCIS is Back and I threw in some butterfly wings to go with.  Might do a BLOODSUCKER stiletto if there's interest (check the PROBOSCIS commit first! Post-Threshold has a fair amount of "be careful for what you wish") but tomorrow is set for Birds and *hopefully* getting this landed.

Birds are in.  Could do more but this is getting to the point where I'd rather land it and see what's needed next.  If anyone's got concerns, now's a great time to make 'em known.