Remove unproduceable 'mail' armor from raws.

Mail shirts and other mail items are still available, as these both
have reactions and are used by invaders. Only ITEM_ARMOR_MAIL was
removed, as it could only be obtained from a mood (although could
then be copied by the inventor).

See http://www.bay12forums.com/smf/index.php?topic=125628.msg4774188#msg4774188
Remove confusing ITEM_ARMOR_LAMELLAR. Lamellar leather armor remains.

Almost every reaction in the game that produces 'lamellar armor'
creates '[lamellar leather] armor', which is 'armor' crafted from
'lamellar leather'. However the boneyard, and some very rare
religious/expedition reactions could create 'lamellar armor',
which was an entirely different thing.

This change keeps the lamellar leather armour pieces that everybody
uses, and removes the confusing and almost entirely unused 'lamellar
armor'.

This also explains why I could never get my military to have uniforms
of lamellar leather armor; I was instructing them to wear 'lamellar armor'
rather than 'armor' of material 'lamellar leather'. :)
Merge branch 'master' into unified

* master:
  Remove confusing ITEM_ARMOR_LAMELLAR. Lamellar leather armor remains.
  Remove unproduceable 'mail' armor from raws.