Fix errors with jquery and wp_enqueue being called outside of a handler.

Ran into issues with WP 4.0 and this plugin where there were errors beign thrown about wp_enqueue. 

```
Notice: wp_enqueue_script was called incorrectly. Scripts and styles should not be registered or enqueued until the wp_enqueue_scripts, admin_enqueue_scripts, or login_enqueue_scripts hooks. 
```

Originally thought that the fix would be to enqueue all of the scripts somehow but remedied the issues with the wp_enqueue errors by simply moving the jquery enequeue into the wp_head handler.