Added _forEach and _map, added tests for them

test/scripts/lib/random-stuff.toy

@@ -0,0 +1,40 @@
+//test this logic for memory leaks
+{
+	import compound;
+	import timer;
+
+	fn start(k, v) {
+		return startTimer();
+	}
+
+	fn check(k, v) {
+		var l = v.stopTimer();
+		print l.timerToString();
+		l.destroyTimer();
+		return v;
+	}
+
+	fn destroy(k, v) {
+		v.destroyTimer();
+	}
+
+	var arr = [1];
+
+	arr
+		.map(start)
+		.map(check)
+		.map(check)
+		.map(check)
+		.map(check)
+		.map(check)
+		.map(check)
+		.map(check)
+		.map(check)
+		.map(check)
+		.map(check)
+		.map(destroy)
+	;
+}
+
+
+print "All good";