[WIP] fix(errors): errors are now attached to data.error

[peggyrayzis]

When this is finished, it should fix this & all related issues in react-apollo.

One thing I want to discuss - do we want to change the property from errors to error on currentResult or just fix it here when we destructure from it in react-apollo. I'm cool w/ either option, just let me know how you want to proceed so I can fix the tests. 😀

[muuki88]

Thanks a lot for fixing this 🏆

From a newcomer and backend-developer perspective I'm in favor of naming the errors object errors.
At first I thought I had an implementation error on the server side until I figured out that this was an apollo bug.

[jbaxleyiii]

@muuki88 I think we should move to networkError and graphQLErrors to be explicit. Its a convention we are using in other places and it could be backwards compat too!