add a section for links

with a link to @KLINGTdotNET's nice reference/cheatsheet/something.
thanks for that! :)

go/README.md

[cross compilation]: http://dave.cheney.net/2012/09/08/an-introduction-to-cross-compilation-with-go
## links
- Andreas Linz has written a [handy reference](https://github.com/KLINGTdotNET/get-go-ing)
    while going through [the Go tour][go tour], that I like to use.
[go tour]: https://tour.golang.org/welcome/1
## qst - run things quickly (and easily)
`qst` has already grown up, it now lives [in it's own place](https://github.com/heyLu/qst).