Issue #1046170 by agentrickard, blackice2999, dereine: Execute preExecute before generate the countQuery to fix pagers with node_access.

#1007466 by aspilicious, dereine: Provide a api function for adding complex queries: add_where_expression, add_having_condition.

#1007730 by bojanz, merlinofchaos, dereine: Fix views_handler_filter_string, add tests and add a general placeholder method.

#698270 by dereine, dagmar: Fix pager legacy functions view::set_items_per_page() and view::set_offset().

#652712 by dagmar: Some pager settings were not getting properly stored with pluggable pagers.

#396380 by merlinofchaos, dereine and dagmar: Initial support for GROUP BY queriescvs add handlers/views_handler_sort_group_by_numeric.inccvs add handlers/views_handler_sort_group_by_numeric.inccvs add handlers/views_handler_sort_group_by_numeric.inccvs add handlers/views_handler_sort_group_by_numeric.inccvs add handlers/views_handler_sort_group_by_numeric.inccvs add handlers/views_handler_sort_group_by_numeric.inc

#648438 by dww: In rare circumstances, unnecessary term_node tables could be joined in when adding term_data relationships.