Merge pull request #642 from Invizory/fix-infinite-recursion-in-parser

Fix infinite recursion in type definition parser

Merge pull request #495 from bhoriuchi/subscription-execution

Subscription execution

Merge pull request #487 from ainilili/patch-1

Change the double quotation marks from simplified to English

Merge pull request #448 from Fontinalis/extensions

Add extensions support

Merge pull request #423 from graphql-go/formatted-error-private-origi…

…nal-error

errors: adds OriginalError support

Merge pull request #376 from Quasilyte/quasilyte/assignOp

simplify assignments with <op>= syntax

Merge pull request #278 from dvic/travis-race

Pass the '-race' flag to goveralls when running tests on TravisCI

Merge pull request #268 from mrhenry/benchmarks

Add benchmarks

Merge pull request #247 from christianpv/patch-1

Add dataloader to Third Party Libs in README.md

Merge pull request #229 from graphql-go/atrniv/fix-cyclic-types

support for cyclic fields on defintion