Install go tool (skip, if you have already a go workspace)
a. Download from the following links:
(linux) https://storage.googleapis.com/golang/go1.8.3.linux-amd64.tar.gz
(mac) https://storage.googleapis.com/golang/go1.8.3.darwin-amd64.pkg
b. untar into /usr/local/ directory
tar -C /usr/local -xzf go$VERSION.$OS-$ARCH.tar.gz
c. Create a go workspace in $HOME/go directory
mkdir -p $HOME/go/{bin,pkg,src} //no space among commas
d. Set the ENV variables (see source_env_go file)
export GOPATH=$HOME/go
export GOBIN=$GOPATH/bin
export PATH=/usr/local/go/bin:$GOBIN:$PATH
e. Install go 'dep' tool
go get -u github.com/golang/dep/cmd/dep