Mutation thresholds-in-progress

Not sure why these are breaking when asked to purify something that's
not a "valid" mutation.  GDB hasn't been cooperating.
Adds chems and reading material to apt bathrooms

No guarantees, but better than nothing.  Codehero spotted for me; much
obliged.
Updating .pot file for translation needs
The Saiga-12 is not a fully automatic weapon.
Adds coffee powder and towels to hotel rooms

Both pretty common things I've found included in hotel stays.
Fixed redundant 'is' in description.
adds coffeemakers to hotel rooms

Exactly What It Says On The Tin.
Less-zealous vector-patrolling

This looks like it works.  I'll delete the test mutation in a separate
commit.
Now with 50% less MC Hammer

There's still the reference when you apply a Hammer to your own square.
Merge some content.