Yet more mutation-compatibility
Tail work

Cleaning up is cleaning up.
Mouthmuts prototype

Got no idea whether this works.  Haven't been able to compile since the
creature-rework.  Argh.
Fix missing l
Fix reading book interruption and trying to sleep
Merge pull request #5124 from KA101/Mut-tidying

Mut-tidying
Fix booking oversight
Clarify description

Just had a minor bughunt because it wasn't clear that this only shows up
if you're installing on a tile that already has a storage unit.

Hoping this saves future problems.
Merge pull request #5126 from KA101/gunfix

Fix booking oversight
Merge pull request #5125 from orzogc/fix-bugs

Fix reading book interruption and trying to sleep
Merge pull request #5127 from KA101/induction-charger-check

Clarify description
Merge pull request #5120 from KA101/MouthTentaclesEnabler

Mouthmuts prototype
Prevent empty log messages from being written.
Fixed error in slimed disease description.
Merge pull request #5130 from desrik/bugfix_slimed

Fixed error in slimed disease description.
Merge pull request #5129 from ianestrachan/no-empty-memorial-logs

Prevent empty log messages from being written.