Merge pull request #5281 from kevingranade/fix-sinew-crafting-bug

Fix sinew crafting bug
Merge pull request #5291 from BevapDin/fix-my-bug-in-inventory_ui

Fix bug that prevents dropping worn items
Back, Torso, Arms, & Hands

Tweaked the leather armor's difficulty up a notch since the leather
trenchcoat requires 6 Tailoring and yet is more encumbering.  Booking
proceeds apace; most of it is book-assisted autolearn.  Improved
detail-attention (as Tailoring improves) justifies a lot of autolearning
IMO.
Rest of it

MWR.
Fix healing bug

Adds a check to the seep-healing for not having any Flimsy traits.
Nothing fancy.
OK, that didn't get included

Turns out I added this but forgot to ctrl-s.  Fixed.
Merge pull request #5319 from KA101/Fix-sleep-healing-bug

[Ready] Fix healing bug
Merge pull request #5315 from BevapDin/fix-vehicle-rotation

Rotate vehicles in map::rotate
Thresholds and initial post-Thresh mutations

There will be more post-thresh and double-prereqs.  But these ought to
start things off well.
show number of characters in world in menu
fix a bug inhibiting compilation
display recipes a book has
Merge pull request #5316 from BevapDin/fix-drop-items-without-hotkey

Fix drop items without hotkey
fix comments
Merge pull request #5324 from BevapDin/show-profession-ingame

Adds profession (if not unemployed) to the character info screen
erase genderswap window for refreshing the text
don't allow welder charges to be consumed without welding goggles
Merge pull request #5325 from illi-kun/erase_gender_window

Erase genderswap window for refreshing the text
Merge pull request #5321 from dvolk/display-recipes

display recipes a book has
Merge rad item, window management, vehicle rotation and item dropping.