Sort part list when inspecting vehicle.
Change trap detection mechanics

Halved perception's influence on trap detection, and added trapping skill into the calculation. Now you'll have to be both perceptive and skilled at traps to notice traps.

I always disliked how you absolutely had to have at least 10 perception if you wanted to be able to see land mines. Now you can make up for lower perception with more trapping skill; you can now see landmines at 10 per and 5 trapping skill, 8 per and 6 trapping skill, 6 per and 7 trapping skill, etc.
bugfixes

It actually works now
remove needless inclusion
Make trap detection easier

From per/2 + traps to per/2 + traps*2.

I like brackets.
Fixed drinking directly from a keg to prevent consuming charges if
player aborts before actually drinking.
Changed keg examine to state current charges and percentage filled
rather than number of 250-ml volume units.
Merge remote-tracking branches 'dda/pr/7748', 'dda/pr/7786' and 'dda/pr/7803' into dda-master

* dda/pr/7748:
  Sort part list when inspecting vehicle.

* dda/pr/7786:
  Make trap detection easier
  remove needless inclusion
  bugfixes
  Change trap detection mechanics

* dda/pr/7803:
  Changed keg examine to state current charges and percentage filled rather than number of 250-ml volume units.
  Fixed drinking directly from a keg to prevent consuming charges if player aborts before actually drinking.