* Add DB() support for Redis driver
* Added support for DB() to all drivers
* Fixed typo in README and Lint issue
* Fix lint issue with ristretto db
* Fix lint issue with bbolt db
* Rename DB() to Conn()
* Replace all instances of _DB with _Conn
* Update all the README files
* Return ArangoDB Client instead of DB
* Public sqlite db options: MaxOpenConns, MaxIdleConns, ConnMaxLifetime.
* Update sqlite3/README.md.
* Add comment lines for the public options.
* Typo
* Set default values for MaxIdleConns, MaxOpenConns, ConnMaxLifetime.