Move ES2015 example into a subpage of the NodeServicesExamples sample

samples/misc/NodeServicesExamples/Views/Home/ES2015Transpilation.cshtml

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+<h1>ES2015 Transpilation</h1>
+
+<p>
+    This sample demonstrates a way of intercepting requests for .js files and dynamically transpiling them
+    from ES2015 code to browser-compatible ES5 code using the Babel library.
+</p>
+
+<p>
+    To see that it's working, open your browser's 'Debug' console and look for the log message. This is
+    produced by the file <a href='/js/main.js'>/js/main.js</a>, which is transpiled from ES2015 dynamically
+    when requested.
+</p>
+
+@section scripts {
+    <script src='/js/main.js'></script>
+}