Use HTTPS endpoint in example

See #16

Author: Acconut

example/src/main/java/io/tus/android/example/MainActivity.java

@@ -41,7 +41,7 @@ protected void onCreate(Bundle savedInstanceState) {
         try {
             SharedPreferences pref = getSharedPreferences("tus", 0);
             client = new TusClient();
-            client.setUploadCreationURL(new URL("http://master.tus.io/files/"));
+            client.setUploadCreationURL(new URL("https://master.tus.io/files/"));
             client.enableResuming(new TusPreferencesURLStore(pref));
         } catch(Exception e) {
             showError(e);