Fines fixes: apparent problems with fines prevent processing.

Fines fixes: apparent problems with fines prevent processing.

CalcFine returned values that mismatched expectations in fines.pl.

fines.pl refactored: added debugging, prevent needless recreation of
Calendar objects by storing them in hash by branch.
Still outstanding problems with fines, including the output of a field
that has no other references in Koha (so is always undef) and the
incorrect description of FinesMode.

Calendar exported "new" erroneously.  I also cleaned up the queries to
avoid needlessly compiling additional statement handles.

Please test and consider application to 3.0 maintenance.

Signed-off-by: Galen Charlton <galen.charlton@liblime.com>
Signed-off-by: Chris Cormack <chris@bigballofwax.co.nz>