OpenConn creates a db connection to one of the postgres dbs.

ErrConfigInfo is returned when the database connection config info could not be parsed.

ErrConnFileNotFound is returned when connection info file cannot be found.

ErrConnFileNotReadable is returned when connection info file cannot be read.

ErrConnNotFound is returned when connection info cannot be found that matches what was passed.

ErrCouldNotOpenDB is returned when the DB could not be opened.

ErrDBUnreachable is returned when the DB is unreachable.

ErrNotFound is returned when a query returns no rows.

ErrUnexpectedEffectedCnt is returned when an expected number of effected rows is not matched.

DBo struct encapsulates sql.DB to add new functions.