export <connection>?
update config.scm and db.scm

* modified:   config.scm

* modified:   config.scm
   Removed: error namespace
   Added: default values init

* modified:   db.scm
   Exported: <connection>?
   Added: connect-db
update default.conf

* modified:   default.conf
   Removed: error fields
   Modified: upload types
added map-table-from-DB, and FPRM works