Adding SPM example

.gitignore

@@ -170,3 +170,5 @@ crashlytics.properties
 crashlytics-build.properties
 
 Examples/Rome/
+TestPackage/.build
+.build/

Makefile

@@ -23,3 +23,11 @@ build_help:
 
 test:
 	cd SwiftlineTests; xctool -project Swiftline.xcodeproj -scheme Swiftline clean build test -sdk macosx GCC_INSTRUMENT_PROGRAM_FLOW_ARCS=YES GCC_GENERATE_TEST_COVERAGE_FILES=YES
+
+test-spm:
+	cd TestPackage && rm -rf .build
+	cd TestPackage && swift build
+
+build-spm:
+	rm -rf .build
+	swift build

Readme.md

@@ -267,7 +267,7 @@ Returns the arguments passed to the script. For example when calling `script -f1
 `Args.parsed.flags` returns a dictinary of flags `["f1": "val1", "f2", "val2"]`
 
 ## Installation
-You can install Swiftline using cocoapods,
+You can install Swiftline using cocoapods, carthage and Swift package manager
 
 ### Cocoapods
     use_frameworks!
@@ -276,6 +276,19 @@ You can install Swiftline using cocoapods,
 ### Carthage
     github 'swiftline/swiftline'
 
+### Swift Package Manager
+Add swiftline as dependency in your `Package.swift`
+
+```
+  import PackageDescription
+
+  let package = Package(name: "YourPackage",
+    dependencies: [
+      .Package(url: "https://github.com/Swiftline/Swiftline.git", majorVersion: 0, minor: 3),
+    ]
+  )
+```
+
 ### Cocoapods + Rome plugin
 If you want to use swiftline in a script you can use [Rome](https://github.com/neonichu/Rome) cocoapod plugin. This plugin builds the framework from the pod file and place them in a Rome directory.
 

TestPackage/Package.swift

@@ -0,0 +1,7 @@
+import PackageDescription
+
+let package = Package(name: "TestPackage",
+  dependencies: [
+    .Package(url: "../", majorVersion: 0, minor: 3),
+  ]
+)

TestPackage/Source/main.swift

@@ -0,0 +1,9 @@
+import Swiftline
+
+let res = ask("How are you doing?")
+
+if res == "Good" {
+  print("Cool!")
+} else {
+  print("Oh, bad!")
+}