enable Darlington books from Pitt to derive

[Hank Bromley]

Renata has received CD's from Univ. of Pittsburgh containing books they've scanned, and has created book items from them:

http://www.archive.org/details/Pitt_Darl_Test1
http://www.archive.org/details/Pitt_Darl_Test2
http://www.archive.org/details/Pitt_Darl_Test3
http://www.archive.org/details/Pitt_Darl_Test3a
http://www.archive.org/details/Pitt_Darl_Test4
http://www.archive.org/details/Pitt_Darl_Test4a

The pages are provided as individual tif files.

Figure out what deriver changes, if any, are needed for such books to be processed.

[Note to self: see own email with notes on what was needed to get the OCA book through (Date: Sun, 28 Oct 2007 11:03:09 -0400 (EDT) and Date: Wed, 7 Nov 2007 13:25:30 -0500 (EST).]