Merge pull request #18 from mattrubin/installation-instructions

Add installation instructions to the README

Author: mattrubin

README.md

@@ -29,6 +29,54 @@ struct Comment: Equatable, Codable {
 }
 ```
 
+
+## Installation
+
+### [Carthage][]
+
+Add the following line to your [Cartfile][]:
+
+````config
+github "mattrubin/Identifier" ~> 0.1
+````
+
+Then run `carthage update Identifier` to install the latest version of the framework.
+
+Be sure to check the Carthage README file for the latest instructions on [adding frameworks to an application][carthage-instructions].
+
+[Carthage]: https://github.com/Carthage/Carthage
+[Cartfile]: https://github.com/Carthage/Carthage/blob/master/Documentation/Artifacts.md#cartfile
+[carthage-instructions]: https://github.com/Carthage/Carthage/blob/master/README.md#adding-frameworks-to-an-application
+
+### [CocoaPods][]
+
+Add the following line to your [Podfile][]:
+
+````ruby
+pod 'Identifier', '~> 0.1'
+````
+
+Identifier, like all pods written in Swift, can only be integrated as a framework. Make sure to add the line `use_frameworks!` to your Podfile or target to opt into frameworks instead of static libraries.
+
+Then run `pod install` to install the latest version of the framework.
+
+[CocoaPods]: https://cocoapods.org
+[Podfile]: https://guides.cocoapods.org/using/the-podfile.html
+
+### [SPM][]
+
+Add the following line to the dependencies section of your [package manifest][Package.swift]:
+
+```swift
+.package(url: "https://github.com/mattrubin/Identifier.git", from: "0.1.0"),
+```
+
+Then add `"Identifier"` to the dependencies array of any target which should be linked with this library 
+
+[SPM]: https://swift.org/package-manager/
+[Package.swift]: https://github.com/apple/swift-package-manager/tree/master/Documentation
+
+
 ## License
 
 Identifier is released under the [MIT License](LICENSE.md).