go quick install

goinstall.sh

= install on mac =

== Install ==

1. `brew update && brew upgrade`
2. `brew install go` or `brew install go`


== env settings ==

1. GOROOT

add to your bashrc or zshrc

```
# go
export GOROOT=`brew --prefix go`/libexec
export PATH=$PATH:$GOROOT/bin
```

2. GOPATH
```
mkdir $HOME/go
echo export GOPATH=$HOME/go >> .zshrc
```

check verison & env

go version
go env