fix(launcher): command line args should be passed as-is to the runner

This allows users to continue to use optimist (or other process.argv) processing
within their tests and grab values from the command line.

Closes #571.

lib/launcher.js

@@ -108,7 +108,9 @@ var init = function(argv) {
   if (childForks.length === 1) {
     var childFork = childForks[0];
     childFork.process = child.fork(
-        __dirname + "/runFromLauncher.js", [], {cwd: process.cwd()});
+        __dirname + "/runFromLauncher.js",
+        process.argv.slice(2),
+        {cwd: process.cwd()});
     reportHeader_(childFork);
 
     childFork.process.send({