message: Add homebrew step
diff: @@ -6,11 +6,13 @@ XRP JS provides a Javascript based SDK for interacting with the Ripple Ledger.
  # Setup
  -These instructions assume you have Homebrew installed and are using OSX.
  +These instructions assume you are using OSX.
  -Install Homebrew: https://brew.sh/
  ```shell
  +# Install Homebrew
  +$ /usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
  +
  # Clone repo
  $ git clone https://github.com/xpring-eng/xpring-js.git
  $ cd xpring-js
  