Bug 3066 - Overhaul guided reports

Bug 3066 - Overhaul guided reports

execute_query now refactored, returns reliable results, does
zero presentation-layer crap.  Arguments reduced, client scripts
adapted to new API and performance improved.  Text::CSV now used
to generate CSV output, ensuring portability, encoding and accuracy.

Replaced tools/runreport.pl with misc/cronjobs/runreport.pl:
    ~ security fixed
    ~ documentation improved
    ~ TODO: finish sendmail option.

Bug 3077 also fixed.

Signed-off-by: Galen Charlton <galen.charlton@liblime.com>
Signed-off-by: Henri-Damien LAURENT <henridamien.laurent@biblibre.com>