Added guide for golang

golang.md

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+# Golang
+
+Interesting detail, if a name is used in your func return, 
+it is as though it was declared in the body of the func.
+
+## Links
+- https://dave.cheney.net/2017/04/26/understand-go-pointers-in-less-than-800-words-or-your-money-back
+- http://devs.cloudimmunity.com/gotchas-and-common-mistakes-in-go-golang/
+- https://learn-anything.xyz/programming/programming-languages/go
+- https://www.youtube.com/watch?v=ltqV6pDKZD8
+- https://making.pusher.com/golangs-real-time-gc-in-theory-and-practice/
+- https://medium.com/learning-the-go-programming-language/writing-modular-go-programs-with-plugins-ec46381ee1a9
+- https://goenning.net/2017/01/25/adding-custom-data-go-binaries-compile-time/
+- https://dave.cheney.net/2014/10/17/functional-options-for-friendly-apis
+- https://blog.gopheracademy.com/advent-2016/go-syntax-for-dsls/
+
+## Concurrency
+- https://divan.github.io/posts/go_concurrency_visualize/
+- https://speakerdeck.com/kavya719/understanding-channels
+- https://www.youtube.com/watch?list=PLq2Nv-Sh8EbZEjZdPLaQt1qh_ohZFMDj8&v=yKQOunhhf4A