add browser-example-with-library maven project (kotlin->javascript)

libraries/examples/browser-example-with-library/src/main/kotlin/sample/Hello.kt

@@ -0,0 +1,16 @@
+package sample
+
+import kotlin.Pair
+import kotlin.browser.document
+import library.sample.*
+
+fun myApp() {
+    val element = document.getElementById("foo")
+    if (element != null) {
+        val p = Pair(10, 20)
+        val x = pairAdd(p)
+        val y = pairMul(p)
+        val z = IntHolder(100).value
+        element.appendChild(document.createTextNode("x=$x y=$y z=$z")!!)
+    }
+}