Update version to 0.0.16, add Appender and AppenderFactory classes, refactor LoggerFactory methods, and implement logging functionality with tests.

src/appenders/AppenderFactory.ts

@@ -0,0 +1,12 @@
+import {AppenderOptions} from './Appender';
+import Appender from './Appender';
+
+export default class AppnederFactory {
+  public static createRemoteAppender(remoteAppenderUrl: string, {domain}: AppenderOptions): Appender {
+    return new Appender(remoteAppenderUrl, {domain});
+  }
+
+  private constructor() {
+    throw new Error('AppenderFactory is a static class that may not be instantiated');
+  }
+}