Readme update

README.md

+![Zip - Zip and unzip files in Swift](https://cloud.githubusercontent.com/assets/889949/12374908/252373d0-bcac-11e5-8ece-6933aeae8222.png)
+
+[![Build Status](https://travis-ci.org/marmelroy/Zip.svg?branch=master)](https://travis-ci.org/marmelroy/Zip) [![Version](http://img.shields.io/cocoapods/v/Zip.svg)](http://cocoapods.org/?q=Zip)
+[![Carthage compatible](https://img.shields.io/badge/Carthage-compatible-4BC51D.svg?style=flat)](https://github.com/Carthage/Carthage)
+
 # Zip
-A Swift ZIP framework 
+A Swift 2 framework for zipping and unzipping files. Simple and quick to use.
+
+## Usage
+
+Import Zip at the top of the Swift file.
+
+```swift
+import Zip
+```
+
+### Setting up with Carthage
+
+[Carthage](https://github.com/Carthage/Carthage) is a decentralized dependency manager that automates the process of adding frameworks to your Cocoa application.
+
+You can install Carthage with [Homebrew](http://brew.sh/) using the following command:
+
+```bash
+$ brew update
+$ brew install carthage
+```
+
+To integrate Format into your Xcode project using Carthage, specify it in your `Cartfile`:
+
+```ogdl
+github "marmelroy/Zip"
+```
+
+### Setting up with [CocoaPods](http://cocoapods.org/?q=Zip)
+```ruby
+source 'https://github.com/CocoaPods/Specs.git'
+pod 'Zip', '~> 0.1'
+```