db_bootstrap: commented out the schema dump after reading INI file
wadindex_schema.ini: changed schema IDs, added PRIMARY KEY
DBFile: close #39 #37; run $sth->execute to check schema table

- Use $dbh/$sth->err to check errors instead of eval{} blocks
- Set $dbh->{PrintError} to 0
- Set $dbh->{sqlite_unicode} to 1