moving generally useful user_search query from bug tracker into the core so that it can be reused with db_map for example in a form builder search widget (reference it with dbqd.acs-tcl.tcl.community-core-procs.user_search)
Removed the unused add-sloan-theme.sql files (they're added in defaults.sql)and switched Oracle's default.sql to use a message key for the Sloan name(as was already done by someone for Postgres.)
