Rename and more diverse examples
It's time to rethink the name and contents of this repo.

- Apollo should be removed from the name, as uploads are not exclusive to Apollo Server and Client. A rename is also likely for `apollo-upload-server`: https://github.com/jaydenseric/apollo-upload-server/issues/68. It might make sense to rename the project `graphql-mutipart-request-spec-examples` (or something similar but shorter, like `graphql-upload-examples`). 
- Apollo Server now has `apollo-upload-server` built in, so we need to use something else like `graphql-api-koa` or `express-graphql` to demonstrate a manual setup.

A new project structure could include a variety of cross-compatible server and client examples, centering around the [GraphQL multipart request spec](https://github.com/jaydenseric/graphql-multipart-request-spec).

- Server:
  - apollo-upload-server
     - With graphql-api-koa
     - With express-graphql
  - apollo-server
- Client:
  - apollo-upload-client
  - graphql-react

It would be great to have examples for each with common cloud storage providers such as AWS S3.