Add AureliaSpa template (#398)

templates/AureliaSpa/ClientApp/app/components/counter/counter.html

@@ -0,0 +1,9 @@
+<template>
+    <h2>Counter</h2>
+
+    <p>This is a simple example of an Aurelia component.</p>
+
+    <p>Current count: <strong>${currentCount}</strong></p>
+
+    <button click.delegate="incrementCounter()">Increment</button>
+</template>

templates/AureliaSpa/ClientApp/app/components/counter/counter.ts

@@ -0,0 +1,7 @@
+export class Counter {
+    public currentCount = 0;
+
+    public incrementCounter() {
+        this.currentCount++;
+    }
+}