fix ncurses build on linux modern systems
Changed mp3 players to significantly reduce micromanagement

Made the mp3 player morale bonus decay significantly faster when no
longer listening and significantly reduced its battery consumption so
total morale duration remains similar.

In short, it's now reasonable to use the mp3 player continuously
rather than to listen for one turn every 30 minutes. This costs about
twice as many charges as optimally micromanaging it used to. If you
still want to micromanage it you now have to listen one turn out of
20, at which point you may as well be scumming the charge calculation
itself.

Making something like "recently enjoyed music" into a disease might be
nice in the future, especially to unify the system with car stereos
and have finer control over decay and stacking than a generic morale
bonus, but for now this way involves minimal code changes.

Also:

* Made mp3 players no longer provide any morale while asleep, to
prevent easily stacking the high int "classical music" bonus.

* Reduced the song frequency from one per 10 turns to one per 5
minutes to keep things reasonable when used continuously.

Detailed comparison:

Old system:

1. Spend 5 charges to play for 50 turns. Morale +50.
2. Turn it off for 299 turns to save battery. Morale still +50.
3. Spend 0.1 charges to play for 1 turn, refreshing the duration.

Steps 2 and 3 then repeat forever until you go to sleep. For 16 hours
of wakefulness, it costs 5 charges to build up the bonus and 32
charges to maintain the bonus, for an optimal total of 37 charges per
day.

If you have to do a single task that takes longer than 30 minutes, it
takes up to 5 charges to build the bonus again. This is normally
pretty rare, and even then it's often with things where current morale
is less of a concern than the focus already gained from it having been
high.

The only realistic time it used more charges than that were when the
player didn't bother to micromanage their music consumption (to the
ludicrous extreme of listening to 6 seconds of music every half
hour). That's not difficulty, that's tedium.

New system:

1. Spend 0.3 charges to play for 50 turns. Morale +50.
2. Spend 63.6 charges to leave it on for 9550 turns. Morale +50.

Granted, you could still micromanage the new system, but that would
mean turning it on for one turn out of every 20, and charge
consumption in general starts to break down at that level of
micromanagement anyway.
Restored previous mp3 player sleeping behavior (that is, using it
while asleep works)
Merge remote-tracking branches 'dda/pr/7843' and 'dda/pr/7865' into dda-master

* dda/pr/7843:
  fix ncurses build on linux modern systems

* dda/pr/7865:
  Restored previous mp3 player sleeping behavior (that is, using it while asleep works)
  Changed mp3 players to significantly reduce micromanagement
Update TRANSLATING.md
Merge pull request #7867 from VlasovVitaly/doc-update

Update TRANSLATING.md
Finishes wooden/metallic naming conversion

I had missed a pair of bolts and have changed fishing spears to match as well, so everything should be good in adjective land now.
Merge pull request #7869 from reverieAlice/meterial_name_changes

Finishes wooden/metallic naming conversion
wood spear → wooden spear

I derped and didn't save melee.json before submitting the last change, sorry. This should complete the transition.
Added recipe for ankle holster

Half the cost of a holster or sheath and requires survival rather than
cutting or pistol. This seemed sensible as it's a small utility
holster that can hold either a small knife or a small pistol
Made BELTED foot items not count as shoes

This means you can wear an ankle holster at the same time as footwear,
as otherwise BELTED wouldn't do anything on a foot slot.

It also means that now if you're running around wearing nothing on
your feet but socks and an ankle holster you get the "no shoes"
movement penalty.
Fixes ethanol burner crash
On hack fail, only shutdown computers next to player
Change RAPID speed_mult to 0.75
Merge pull request #7870 from reverieAlice/wood_spear_derp

wood spear → wooden spear
Mainly for farming, show plantname when examining a square fo terrain.
Merge branch 'ethanol_burner_fix' of https://github.com/reverieAlice/Cataclysm-DDA into merge
Merge branch 'bootstrapping-bootstraps' of https://github.com/rluddy/Cataclysm-DDA into merge
Merge branch 'fix-computer-shutdown' of https://github.com/vidarsk/Cataclysm-DDA into merge
Fix typo

I think the speed's OK, but the syntax was missing something.  ;-)