Reworking, simplifying, and speeding up cache implementation.

Fixing the infelicity where you couldn't have '|' and ':' inside
quoted modifier arguments.

demo/index.php

@@ -4,7 +4,9 @@ require("Smarty.class.php");
 
 $smarty = new Smarty;
 
-$smarty->cache_engine = false;
+$smarty->caching = false;
+
+$smarty->assign(now, time());
 
 $smarty->assign("Name","Fred Irving Johnathan Bradley Peppergill");
 $smarty->assign("FirstName",array("John","Mary","James","Henry"));
@@ -19,4 +21,11 @@ $smarty->assign("now",time());
 
 $smarty->display("index.tpl");
 
+function insert_foo($args)
+{
+	extract($args);
+
+	return "test $arg1";
+}
+
 ?>

demo/templates/index.tpl

@@ -48,3 +48,5 @@ testing strip tags
 </PRE>
 
 test: {$now|date_format:"%I:%M %p"}
+
+{insert name = foo arg1=5}