Dwarf Manual Update Notes (v4g):

	- Matched building construction skill from building_masterwork.txt
		- Many are Architect/Mason, but some are not.
	- Updated descriptions on Apothecary, Biologist.
	- Trouble with Alchemist & Chemist
		- Alchemist Lab is built by Chemist & Soap Maker (POTASH_MAKING),
			not Alchemist (LYE_MAKING)
		- Chemist Lab is built by Alchemist.
		- I'm looking at skills from the image in
	masterwork-dwarf-fortress/MasterworkDwarfFortress/repository/changes.html#aa
		- I'll let someone else decide when to update building_masterwork.txt
	- Toxicist built by WAX_WORKING (Waxer & Chandler), should this be TRAPPER?
	- Morul's and Trade Storehouse do not require Mason, just Architect.
	- Corrected some typos.
Merge pull request #89 from TonyHargrove/manual

Dwarf Manual Update Notes (v4g)
blast furnace batch announcements

- processing galena into batches of bars now announces that silver and
lead bars have been created, rather than aluminum
- added a new announcement for batches of nickel bars