LRDOCS-523 Reorganized and integrated IDE steps in service.xml section

Hi Jesse,

Can you review the changes I made to this section? I integrated steps for the reader to follow to create the service using Liferay IDE. I've incorporated your explanations of the service elements in these steps. I've left your service.xml source until the very end for the reader to compare with the service that he just built.

I'm not sure if some of the steps would be best written in ordered list form (1., 2., etc). So I thought I'd use paragraph form for now.

If you would, please review and let me know your thoughts.

Thanks!