Encoder

Hello @a8m  I'm planning to use this package to one of my new projects, but
we don't see any docs relative to the this package,

I tried to search source code for an alternative of:

``` go
json.NewEncoder(w).Encode(v)
```

and I couldn't find.

So my question is: does this package supports encode (from struct to []byte) or you're planning to implement something like this?
