MAJOR CHANGE: moved sql_lib() from M::Base to new M::Role::Query; moved all M::R::QueryFormatter methods into M::R::Query; removed sql_lib() from ScriptHelpers - using new M::Roles::Query method; removed lims_dbix() from M::Base - now loaded via M::Role::DBIxSimple on demand; moved get_sql_with_constraint() from M::R::DBIxSimple to M::R::Query; method gets dbh from lims_db not lims_dbix in M::LabSection::update_lab_sections() & M::Specimen::update_specimens(); added elements() to Local::QueryLibrary

refactored date constraints templates for charts & audit/stats functions into new date_constraints.tt + form2queryparam.js files; new audit functions

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