Forked version of the apollo tutorial to showcase an issue with apollo codegen:generate

To reproduce:

1. Go to the client directory:

$ cd final/client

3. Install dependencies:

$ yarn # or npm install

4. Run apollo codegen:generate:

 $ npx apollo codegen:generate --target flow --includes src/sample-queries.js --localSchemaFile schema.json
  ✔ Loading Apollo Project
  ✔ Generating query files with 'flow' target - wrote 1 files

There are two queries defined in src/sample-queries.js, a valid one (which is correctly picked up by apollo-cli) and one with a syntax error, which is silently ignored - which might be a problem.