Added default language pack (en-gb)

admin/extension/module/google_hangouts.php

@@ -0,0 +1,19 @@
+<?php
+// Heading
+$_['heading_title']    = 'Google Hangouts';
+
+// Text
+$_['text_extension']   = 'Extensions';
+$_['text_success']     = 'Success: You have modified Google Hangouts module!';
+$_['text_edit']        = 'Edit Google Hangouts Module';
+
+// Entry
+$_['entry_code']       = 'Google Talk Code';
+$_['entry_status']     = 'Status';
+
+// Help
+$_['help_code']        = 'Goto <a href="https://developers.google.com/+/hangouts/button" target="_blank">Create a Google Hangout chatback badge</a> and copy &amp; paste the generated code into the text box.';
+
+// Error
+$_['error_permission'] = 'Warning: You do not have permission to modify Google Hangouts module!';
+$_['error_code']       = 'Code Required';