Bug 9093 - 008 forgetting what material type was chosen

Bug 9093 - 008 forgetting what material type was chosen

This patch adds material type checking to the MARC21 008 tag editor,
based on value from the leader. That is, the 008 tag editor
will choose an initial material type based on the leader 06
(and if necessary the leader 07 position)

_TEST PLAN_
1) Create a new record or open an existing bib record
2) Change position 6 from its current value (probably "a") to
"c" or "e" or "g" or "m" or "p". (See the end of this message
for a comprehensive list of 06 values to try.)
3) Open the 008 tag editor
4) Note that it still says BKS even though it should say "MU"
or "MP" or "VM" or "CF" or "MX".

5) Apply the patch

6) Repeat steps 2 and 3.
7) Note that the 008 tag editor now shows the correct material
type based on the leader.

8) For more comprehensive checking, try switching position 6
back to "a" and changing position 7 to "b" instead of "m".
9) Note that it will switch from "BKS" to "CR".
10) Fin

Comprehensive mapping:

Field 008/18-34 Configuration
If Leader/06 = a and Leader/07 = a, c, d, or m: Books
If Leader/06 = a and Leader/07 = b, i, or s: Continuing Resources
If Leader/06 = t: Books
If Leader/06 = c, d, i, or j: Music
If Leader/06 = e, or f: Maps
If Leader/06 = g, k, o, or r: Visual Materials
If Leader/06 = m: Computer Files
If Leader/06 = p: Mixed Materials
http://www.loc.gov/marc/bibliographic/bdleader.html

Signed-off-by: Bernardo Gonzalez Kriegel <bgkriegel@gmail.com>
Work as described, nice job.
koha-qa complains for a tab char, removed on followup.
Mode change on TT file (+x), removed.
No other errors

NOTE: It would be desirable to update LEADER values
to reflect changes on 008.

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>
Awesome work David.