**Sessions were re-written **
- Developers can use more than one 'session database', at the same time,
to store the sessions
- Easy to develop a custom session database (only two functions are
required (Load & Update)), [learn
more](https://github.com/iris-contrib/sessiondb/blob/master/redis/database.go)
- Session databases are located
[here](https://github.com/iris-contrib/sessiondb), contributions are
welcome
- The only frontend deleted 'thing' is the: **config.Sessions.Provider**
- No need to register a database, the sessions works out-of-the-box
- No frontend/API changes except the
`context.Session().Set/Delete/Clear`, they doesn't return errors
anymore, btw they (errors) were always nil :)
- Examples (master branch) were updated.
```sh
$ go get github.com/iris-contrib/sessiondb/$DATABASE
```
```go
db := $DATABASE.New(configurationHere{})
iris.UseSessionDB(db)
```
> Note: Book is not updated yet, examples are up-to-date as always.
