moved M::Chart::get_sql_with_constraint() and _get_search_constraints() to M::Roles::DBIxSimple for code shart between M::Chart and M::Audit; replaced C::Chart::_get_chart_title() function with __PACKAGE__constraint_title, set in M::Roles::DBIxSimple::_set_chart_constraints()

C::Chart::process() returns cleardot if no data instead of crash; new constraint 'all since year x'; new specimen frequency chart

moved sql out of M::Chart into chart.sql; new resources/charts

hilis3 conversion scripts for YHHN