reorganized build-ins and implement a circular queue as an example

misc/makegarbage.noja

@@ -0,0 +1,19 @@
+# This script creates a lot of objects, so it can be used to stress the garbage collector.
+
+print('Start\n');
+
+i = 0;
+n = 10000000;
+
+while i < n: {
+
+	1 + 1 * 1;
+	i = i + 1;
+
+	fun printPercent()
+		print(100.0 * i / n, '%\n');
+	
+	printPercent();
+}
+
+print('End\n');