Merge pull request #22 from wp-graphql/release/v1.0.1 release v1.0.1 - update version numbers

Merge pull request #16 from henrikwirth/feature/graphiql-explorer-gatsby Adds GraphQL-Explorer to WP-GraphiQL in the way gatsby is using it.

Merge pull request #9 from wp-graphql/feature/update-dependencies Feature/update dependencies

Merge pull request #8 from wp-graphql/bug/#7-wrong-location-url - add composer.json so the plugin can be installed from Composer

Merge branch 'master' of https://github.com/wp-graphql/wp-graphiql