maint-bin: Added command to export just the manual.
maint-bin: Auto export the manual.
Combine all NPC orc reactions into GREENSKIN_ORC for easy management.

This may or may not fix bugs where orc traders arrive with all sorts
of wacky things.
Fix of Falconne's stocks plugin when melting items.

Previously this could cause a crash. See
http://www.bay12forums.com/smf/index.php?topic=133174.msg4896387#msg4896387
Merge branch 'master' into orc_rebalance

* master:
  Fix of Falconne's stocks plugin when melting items.
  Combine all NPC orc reactions into GREENSKIN_ORC for easy management.
  maint-bin: Auto export the manual.
  maint-bin: Added command to export just the manual.