grunt.loadNpmTasks now supports Array argument.

Now, you can do:

```javascript
grunt.loadNpmTasks([
  'grunt-contrib-coffee'
  'grunt-contrib-compass'
  'grunt-contrib-connect'
  'grunt-contrib-copy'
  'grunt-contrib-jade'
  'grunt-contrib-watch'
  'grunt-contrib-clean'
]);
```

Basically, I wrapped the stuff that was in `task.loadNpmTasks` in a for loop. If the argument is not an array, I stick it in an array. Simple stuff!