facetapi 7.x-1.0-rc2

#1418526: Update facetapi.php so 'query types' for widgets are documented by fangel
#1394200: Explore performance impact of caching the return values of hook_facetapi_facet_info() implementations by cpliakas
#1395224: Empty facet behavior plugin is executed on facets that fail dependencies by cpliakas
#1399706: Mapping callbacks are invoked when there are no values to map leading to fatal errors in some callbacks by SangersDrupalDude, chrisyates
#1394810: User 1 does not automatically pass the role dependency which is inconsistent with other areas of Drupal by natuk, cpliakas
#1399820: Use the user_load_multiple() API function instead of a raw SQL call in facetapi_map_author() by cpliakas
#1397826: Document $options arguments in mapping callbacks by cpliakas
#1392888: Plural strings are not supported by the "Custom text" Current Search Block plugin by cpliakas
#1392676: Make date format more easily customizable by cpliakas
#1394204: Excessive SQL queries being generated when loading settings by cpliakas
#1387322: Remove dependent facet items from the query string when the facet item they depend on is deactivated by ygerasimov, SergeyR, cpliakas
#1390512: Pass the facet parameters to the 'alter callbacks' functions by Damien Tournoud
#1390510: Empty sorts interfere with the default facet sorting returned by the search server by Damien Tournoud
#1388348: Receiving a notice error for an undefined index "#html" on line 179 of facetapi.tokens.inc by cpliakas, DerTobi75