Hi, I need to control an aria2 daemon from go and I found your library. I found it quite neat and I wanted to improve it (to improve my "go-writing" skills ^^). I took the liberty of creating a fork and reorganizing it quite heavily : https://github.com/oliverpool/argo (I tried to make a nice godoc page, with a complete example : https://godoc.org/github.com/oliverpool/argo). I you want, I can make a PR to merge it into your library (it will break all compatibility) or we can let them live separately (You can see diff : https://github.com/zyxar/argo/compare/master...oliverpool:master). I did not implement the [`system.multicall`](https://aria2.github.io/manual/en/html/aria2c.html#system.multicall) RPC method yet (because it is quite complicated). But maybe I could implement it using a special `Caller` which could gather them and send them all at the same time.