start of reworking call number handling and other Biblio changes

start of reworking call number handling and other Biblio changes

Most of this commit by Joshua Ferraro.
updatedatabase changes by Galen Charlton.

Major changes:

This commit includes a lot of fairly major changes
to Koha's Biblio handling, largest is the addition
and deletion of several columns in the biblioitems,
items tables, as well as cleanup of deletedbiblioitems,
deleteditems tables. Some of the changes are simple
cleanup, but most have to do with improvements to
storage of call numbers in Koha.

Also, I had to clean up the _koha_* routines quite a
lot to make them work -- there was lots of data just
being lost because columns weren't being updated.

I'm still not completely convinced that the items
table is being treated as authoritative for items
data, investigating further.

DB Changes (updated in kohastructure.sql and in
updatedatabases):

ADDED:
biblioitems.cn_source   ( auth value, CN_SOURCE, stores the source of the
                          call number: DDC, LCC, NLM, etc.)
biblioitems.cn_class    ( plugin, marc21_callnumber.pl, helps fill in
                          the rest of the biblio-level fields)
biblioitems.cn_item
biblioitems.cn_suffix
biblioitems.cn_sort     ( for zebra sorting, stored as a decimal number)
biblioitems.totalissues ( for counting the total times issued )

items.cn_source         ( auth value, CN_SOURCE, stores DDC, LCC, NLM, etc.)
items.itemcallnumber    ( plugin, marc21_itemcallnumber.pl, helps fill in
                          the itemcallnumber based on the record data )
items.cn_sort           ( for zebra sorting, stored as a decimal number)
items.ccode             ( auth value, CCODE, stores the Collection Code
                          of the item, can be used as call number prefix
                          by some libraries )
items.uri
items.materials
items.damaged

DELETED:
items.itype
items.cutterextra
biblioitems.classification
biblioitems.subclass
biblioitems.dewey
biblioitems.lcsort
biblioitems.lccn
biblioitems.ccode

DB version now 3.00.00.009.

Minor changes:

* Drop revision history from C4/Biblio.pm
* GetMarcAuthors now returns additional authors (7XX), not
  main authors (1XX)
* Debug warnings in C4/Search.pm commented out

Signed-off-by: Chris Cormack <crc@liblime.com>
Signed-off-by: Joshua Ferraro <jmf@liblime.com>