update README

Author: quanvo87

README.md

@@ -2,15 +2,61 @@
 
 Swift module that helps with running multiple, concurrent, asynchronous tasks in a clean way.
 
+## Contents
+
+1. [Requirements](#requirements)
+2. [Installation](#installation)
+    - [CocoaPods](#cocoapods)
+    - [Carthage](#carthage)
+    - [Swift Package Manager](#swift-package-manager)
+    - [Manually](#manually)
+3. [Documentation](#documentation)
+4. [Example Usage](#example-usage)
+5. [Working Example](#working-example)
+6. [License](#license)
+7. [Authors](#authors)
+
 ## Requirements
 
-Swift 4 / Xcode 9
+Swift 4
 
 ## Installation
 
+#### CocoaPods
+
+For [CocoaPods](http://cocoapods.org/), add to `Podfile`:
+
+```ruby
+pod 'GroupWork', '~> 0.0.3'
+```
+
+#### Carthage
+For [Carthage](https://github.com/Carthage/Carthage), add to `Cartfile`:
+
+```
+github "quanvo87/GroupWork"
+```
+
+#### Swift Package Manager
+
+For [SPM](https://swift.org/package-manager/), add to your package dependencies:
+
+```
+.package(url: "https://github.com/quanvo87/GroupWork.git", .upToNextMinor(from: "0.0.0")),
+```
+
+#### Manually
+
+- for projects, drag `GroupWork.swift` to the project tree
+- for workspaces, include the whole `GroupWork.xcodeproj`
+
+## Documentation
+
+[Here]()
+
 ## Example Usage
 
-### End Goal
+#### End Goal
 
 ```swift
 import GroupWork
@@ -39,7 +85,7 @@ Caveats:
   - `work.result` is only a simple `Bool`
   - this is not an answer to [callback hell](http://callbackhell.com/)
 
-### Set Up
+#### Set Up
 
 There is some set up required in order to create `complexFunc()` from above:
 
@@ -76,3 +122,16 @@ Caveats:
   - notice that in each function, `start()` is called before each asynchronous task
   - `finish(withResult:)` is called in the completion handler of each asynchronous task
   - `start()` and `finish()` calls MUST be balanced
+
+## Working Example
+
+The [tests]() have a working example.
+
+## License
+[MIT](http://opensource.org/licenses/MIT) [LICENSE](LICENSE)
+
+## Authors
+
+[Quan Vo](https://github.com/quanvo87), [Wilson Ding](https://github.com/dingwilson)
+
+*Please provide attribution, it is greatly appreciated.*