Update global-change-biology

Their examples at http://onlinelibrary.wiley.com/journal/10.1111/(ISSN)1365-2486/homepage/ForAuthors.html are not very consistent with each other or with published formatting (and even in published material there is a good number of inconsistencies), so I went with the most common and reasonable formatting.

Proper formatting for books is pending citation-style-language/locales#59

Reported https://forums.zotero.org/discussion/31333/global-change-biology-style/