Updating the binary script to understand debug, so that

protractor debug conf.js works.

bin/protractor

@@ -2,5 +2,41 @@
 
 if( !process.env.NODE_ENV ) process.env.NODE_ENV = 'test';
 
-var path = require('path');
-require(path.join(__dirname,'../lib/cli.js'));
+/**
+ * This tiny wrapper file checks for node debug flags and appends them
+ * when found, before invoking the real executable. Thanks to mocha for the
+ * pattern.
+ */
+
+var spawn = require('child_process').spawn,
+    args = [__dirname + '/../lib/cli.js'];
+
+process.argv.slice(2).forEach(function(arg) {
+  var flag = arg.split('=')[0];
+
+  switch (flag) {
+    case '-d':
+      args.unshift('--debug');
+      break;
+    case 'debug':
+    case '--debug':
+    case '--debug-brk':
+      args.unshift(arg);
+      break;
+    default:
+      if (0 == arg.indexOf('--trace')) args.unshift(arg);
+      else args.push(arg);
+      break;
+  }
+});
+
+var proc = spawn(process.argv[0], args, { stdio: 'inherit' });
+proc.on('exit', function (code, signal) {
+  process.on('exit', function() {
+    if (signal) {
+      process.kill(process.pid, signal);
+    } else {
+      process.exit(code);
+    }
+  });
+});