Could anyone by any chance cancel my first two builds on Appveyor for this PR as well as my second build on Travis? They are all out of date builds now and would certainly speed things up on Appveyor. I would do it myself, but I have no permission on either site.

Alas, I forgot about backwards compatibility with Python 2.6. To whoever cancelled my Appveyor builds (BTW: thanks!), if you could also cancel the remaining builds for my PR, that would be great!

Thanks @gfyoung .

If your appveyor queue time for outdated builds is a frequent problem, you can have this snippet (MIT licensed from Julia):

# If there's a newer build queued for the same PR, cancel this one
  - ps: if ($env:APPVEYOR_PULL_REQUEST_NUMBER -and $env:APPVEYOR_BUILD_NUMBER -ne ((Invoke-RestMethod `
        https://ci.appveyor.com/api/projects/$env:APPVEYOR_ACCOUNT_NAME/$env:APPVEYOR_PROJECT_SLUG/history?recordsNumber=50).builds | `
        Where-Object pullRequestId -eq $env:APPVEYOR_PULL_REQUEST_NUMBER)[0].buildNumber) { `
        throw "There are newer queued builds for this pull request, failing early." }

edit: and equivalent for Travis https://github.com/JuliaLang/julia/blob/master/contrib/travis_fastfail.sh

@tkelman : Could you put up a PR for that? I think lots of people would be happy with such an addition.