Don't wait 50 ms between tests

There are now enough tests to make this take a serious amount of time.

A 0 timeout seems to work just as well.

test/driver.js

@@ -82,7 +82,7 @@ function runTests(callback) {
       else callback("error", test.name, e.toString());
     }
     if (!quit) { // Run next test
-      setTimeout(function(){step(i + 1);}, 50);
+      setTimeout(function(){step(i + 1);}, 0);
     } else { // Quit tests
       running = false;
       return null;