3853 Child works should be listed in the last posted chapter

https://code.google.com/p/otwarchive/issues/detail?id=3853

We were putting child works in the last chapter, not last posted chapter, so sometimes they'd be on drafts and only visible to the work owner. The link to end notes and child works was pointing to the last chapter instead of last posted chapter, but now it takes you to the last chapter, since that is where that information is.

Please forgive the 37 different issue numbers in the commit messages. I can't read numbers, apparently. They're all for Issue 3845.