patron attributes - batch import

patron attributes - batch import

When ExtendedPatronAttributes is ON, the batch
patron import tool's behavior changes as follows:

[1] A new (required) column is added to the input CSV
    format.  This column should contain a list of
    attributes to set for the record, each value
    preceded by its type code.  For example, if
    the superlibrarian has defined two types,
    a unique identifier INSTID and a repeatable
    BASEBALL, this field could contain:

    "INSTID:12345,BASEBALL:Cubs"

    This field must be wrapped in quotes if multiple
    values are defined.  Since values can contain
    spaces, additional doubled-quotes may be required:

    "INSTID:12345,BASEBALL:Cubs,""BASEBALL:White Sox"""

    When replacing a patron record, any attributes specified
    in the input file replace all of the attribute values
    of any type that were previously assigned to the patron
    record.

[2] It is possible to specify a field other than the
    cardnumber to use for looking for matching patrons.
    Specifically, any attribute marked as a unique ID
    can be used.  The operator is asked to specify
    which ID type to use; if an input record has an
    attribute value of that type, and exactly one patron
    record in the database has that value, then the
    record will be overlaid or ignored according to the
    overlay setting.

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