Add example where qualifiers are used

.gitignore

@@ -2,6 +2,7 @@
 /poodinis.lib
 /poodinis.obj
 /quickstartExample.exe
+/qualifiersExample.exe
 /.settings
 /.dub
 /dub.selections.json

.travis.yml

@@ -3,3 +3,4 @@ language: d
 script:
   - dub test --build=unittest --config=unittest
   - dub build --build=release --config=quickstartExample
+  - dub build --build=release --config=qualifiersExample

dub.json

@@ -34,7 +34,6 @@
 		{
 			"name" : "quickstartExample",
 			"description" : "Quickstart example from the Poodinis readme.",
-			"license": "MIT",
 			"targetType": "executable",
 			"targetName": "quickstartExample",
 			"sourcePaths": [
@@ -43,6 +42,18 @@
 			"importPaths": [
 				"source"
 			]
+		},
+		{
+			"name" : "qualifiersExample",
+			"description" : "Quickstart example where qualifiers are used.",
+			"targetType": "executable",
+			"targetName": "qualifiersExample",
+			"sourcePaths": [
+				"example/qualifiers"
+			],
+			"importPaths": [
+				"source"
+			]
 		}
 	]
 }

example/qualifiers/app.d

@@ -0,0 +1,50 @@
+import poodinis.dependency;
+
+import std.stdio;
+
+interface Engine {
+	public void engage();
+}
+
+class FuelEngine : Engine {
+	public void engage() {
+		writeln("VROOOOOOM!");
+	}
+}
+
+class ElectricEngine : Engine {
+	public void engage() {
+		writeln("hummmmmmmm....");
+	}
+}
+
+class HybridCar {
+	alias KilometersPerHour = int;
+
+	@Autowire!FuelEngine
+	public Engine fuelEngine;
+
+	@Autowire!ElectricEngine
+	public Engine electricEngine;
+
+	public void moveAtSpeed(KilometersPerHour speed) {
+		if (speed <= 45) {
+			electricEngine.engage();
+		} else {
+			fuelEngine.engage();
+		}
+	}
+}
+
+void main() {
+	auto container = DependencyContainer.getInstance();
+
+	container.register!HybridCar;
+	container.register!(Engine, FuelEngine);
+	container.register!(Engine, ElectricEngine);
+
+	auto car = container.resolve!HybridCar;
+
+	car.moveAtSpeed(10); // Should print "hummmmmmmm...."
+	car.moveAtSpeed(50); // Should print "VROOOOOOM!"
+}