Bug 12404: Allow TT tags for csv profiles

Bug 12404: Allow TT tags for csv profiles

This patch is the main patch. It contains the changes in
C4::Record::marcrecord2csv.

The goal of this development is to provide a better flexibility on
creating a CSV profile.
Currently it is not possible to:
- Concatenate specific subfields into a csv column
- Display a field/subfield using a condition
- Extract a substring of a subfield value
and a lot of other actions.

This patch allows to write Template Toolkit code and to extract only
data you want.

See the help page for more information (in next patch).

Test plan:
Create some CSV profiles (MARC, not SQL) using some TT methods.
Use the basket export and the export tool and verify the CSV file
generated is what you expected.

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