Update to Play JSON 2.5.2, add “updateAs” method

[stanch]

This includes two commits from @MountVacation to update the version of Play JSON.

[stanch]

Just realized that my last commit on master also went into this PR, so now it’s not mergeable. Let me know if you want to merge, then I can remove it. But in the meantime I’ve published my fork to my own Bintray repo.

[mandubian]

Github tells me I can merge it... What is the problem?

[stanch]

The problem is that it now has a commit where I changed the publishing setup :)

[stanch]

I am happy to remove that commit if you are willing to merge and publish yourself :)

[mandubian]

tell me what you prefer me to do, I'm not using the zipper anymore, so you're the lead now ;)

[stanch]

I suppose I can maintain it in my fork since we are using it at work :)