Smarty Extended class update

Move all smarty and path settings into the Smarty Extended class

the include files <admin|frontend>_set_paths.php and <admin|frontend>_smarty.php

are deprecated.

For special frontend smarty (which will be not used in future anyway) a
dedicated sub class to Smarty Extended with its own methods should be
created

www/includes/templates/admin/smarty_test.tpl

@@ -1,6 +1,9 @@
 <div>
 	{$SMARTY_TEST}
 </div>
+<div>
+	TRANSLATION CLASS: {$TRANSLATE_TEST}
+</div>
 <div>
 	<select id="drop_down_test" name="drop_down_test">
 		{html_options options=$drop_down_test selected=$drop_down_test_selected}
@@ -11,6 +14,9 @@
 		<div id="test-div" class="test-div">
 			Some content ehre or asdfasdfasf
 		</div>
+		<div id="translate-div">
+			TRANSLATION SMARTY: {t}I should be translated{/t}
+		</div>
 	</div>
 </div>
 {* progresss indicator *}