Create journal-of-the-american-college-of-surgeons.csl

This is a style sheet for the Journal of the American College of Surgeons. It implements the formatting described here http://www.elsevier.com/journals/journal-of-the-american-college-of-surgeons/1072-7515/guide-for-authors#ref
Update journal-of-the-american-college-of-surgeons.csl
fix editor macro
Merge pull request #978 from z0lo/patch-2

Create journal-of-the-american-college-of-surgeons.csl