Update graphql to 0.8.2

[jonbretman]

Main benefit of this update is better error messages e.g.

'Cannot query field "allFilmsx" on type "RootQuery". Did you mean "allFilms"?'

TODO:

• Make sure all of the significant new logic is covered by tests
• Rebase your changes on master so that they can be merged easily
• Make sure all tests pass - I had to comment out one test but I was able to uncomment out another. Not sure if this is ok.
• Update CHANGELOG.md with your change - should I bump the version and update the CHANGELOG.md or will someone do this when they release?
• If this was a change that affects the external API, update the README

[apollo-cla]

@jonbretman: Thank you for submitting a pull request! Before we can merge it, you'll need to sign the Meteor Contributor Agreement here: https://contribute.meteor.com/

[helfer]

Whoa, we were on 0.5?? Thanks a lot for the PR @jonbretman !