Merge pull request #77 from pablocarmu/fix_brew_setup

Fixed the homebrew shell commands to install nef inside Quick Start.playground

Author: miguelangel-dev

contents/Documentation/Quick start.playground/Pages/Installation.xcplaygroundpage/Contents.swift

@@ -10,14 +10,14 @@
  `nef` can be installed using [Homebrew](https://brew.sh). `nef` needs Xcode and [Cocoapods](https://cocoapods.org) as dependencies. It will warn you if there is a missing dependency and will provide guidance to install it.
 
  ```bash
- ➜ nef tap bow-swift/nef
- ➜ nef install nef
+ ➜ brew tap bow-swift/nef
+ ➜ brew install nef
  ```
 
  You can upgrade the version of `nef` using the following command
 
  ```bash
- ➜ nef upgrade nef
+ ➜ brew upgrade nef
  ```
 
  */