coder_upgrade.install.inc: Add this file, implement #afile, #info_core_7;...

coder_upgrade.install.inc: Add this file, implement #afile, #info_core_7; coder_upgrade.list.inc: Allow for array of files to be associated with a routine, add entries for install_file and info_file routines; coder_upgrade.db.inc: Add this file, start on #dbtng for non-select queries.