Add banner to admin footer

To contain the app version, once we move to doing dev/master branches with releases.

Also adding the standard links to the forum, docs and sponsor services page.

footer.php

@@ -45,4 +45,4 @@
 
 //$time_end = microtime(true);
 //$execution_time = ($time_end - $time_start);
-//echo '<h2>Total Execution Time: '.number_format((float) $execution_time, 10) .' seconds</h2>';
+//echo '<h2>Total Execution Time: '.number_format((float) $execution_time, 10) .' seconds</h2>';