clean up indentation in gruntfile
Added --test option to specify which test to run for node-qunit
Revert "clean up indentation in gruntfile"

This reverts commit a10858c74ff29b6fbf1bbf3982af91f4c62bb909.
reapplied 547081a without modifications to jshint
Merge pull request #549 from ymichael/gruntfile_changes

Gruntfile changes