Add a playground

Author: kylef

Commander.playground/Contents.swift

@@ -0,0 +1,15 @@
+import Commander
+
+let group = Group {
+  $0.command("login") { (username:String) in
+    print("You are now logged in \(username).")
+  }
+
+  $0.command("logout") {
+    print("You are not logged out.")
+  }
+}
+
+group.run([])
+group.run(["login", "kyle"])
+group.run(["logout"])

Commander.playground/contents.xcplayground

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<playground version='5.0' target-platform='osx' requires-full-environment='true' display-mode='raw'>
+    <timeline fileName='timeline.xctimeline'/>
+</playground>

Commander.playground/timeline.xctimeline

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Timeline
+   version = "3.0">
+   <TimelineItems>
+   </TimelineItems>
+</Timeline>

Commander.xcodeproj/project.pbxproj

@@ -46,6 +46,7 @@
 		279256B31BB3260D00E66B9E /* Group.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = Group.swift; sourceTree = "<group>"; };
 		279256B51BB32A8E00E66B9E /* ArgumentConvertible.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = ArgumentConvertible.swift; sourceTree = "<group>"; };
 		279256B71BB32B3F00E66B9E /* ArgumentConvertibleTests.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = ArgumentConvertibleTests.swift; sourceTree = "<group>"; };
+		279256B91BB32E4200E66B9E /* Commander.playground */ = {isa = PBXFileReference; lastKnownFileType = file.playground; path = Commander.playground; sourceTree = "<group>"; };
 		27B1A0FE1BACD69500B1260F /* ArgumentParserTests.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = ArgumentParserTests.swift; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
@@ -71,6 +72,7 @@
 		2768A2161BACC38C00F994EE = {
 			isa = PBXGroup;
 			children = (
+				279256B91BB32E4200E66B9E /* Commander.playground */,
 				2768A2221BACC38C00F994EE /* Commander */,
 				2768A22E1BACC38C00F994EE /* CommanderTests */,
 				2768A2211BACC38C00F994EE /* Products */,