Update links of Apollo Server (graphql#419)

Author: ydfzgyj

site/code/index.html.js

@@ -253,22 +253,22 @@ app.use('/graphql', graphqlHTTP({
 app.listen(4000, () => console.log('Now browse to localhost:4000/graphql'));
 \`\`\`
 
-#### [graphql-server](http://dev.apollodata.com/tools/graphql-server/index.html) ([github](https://github.com/apollostack/graphql-server)) ([npm](https://www.npmjs.com/package/graphql-server-express))
+#### [apollo-server](https://www.apollographql.com/docs/apollo-server/) ([github](https://github.com/apollographql/apollo-server)) ([npm](https://www.npmjs.com/package/apollo-server-express))
 
 A set of GraphQL server packages from Apollo that work with various Node.js HTTP frameworks (Express, Connect, Hapi, Koa etc).
 
-To run a hello world server with graphql-server-express:
+To run a hello world server with apollo-server-express:
 
 \`\`\`bash
-npm install graphql-server-express body-parser express graphql graphql-tools
+npm install apollo-server-express body-parser express graphql graphql-tools
 \`\`\`
 
 Then run \`node server.js\` with this code in \`server.js\`:
 
 \`\`\`js
 var express = require('express');
 var bodyParser = require('body-parser');
-var { graphqlExpress, graphiqlExpress } = require('graphql-server-express');
+var { graphqlExpress, graphiqlExpress } = require('apollo-server-express');
 var { makeExecutableSchema } = require('graphql-tools');
 
 var typeDefs = [\`
@@ -295,7 +295,7 @@ app.use('/graphiql', graphiqlExpress({endpointURL: '/graphql'}));
 app.listen(4000, () => console.log('Now browse to localhost:4000/graphiql'));
 \`\`\`
 
-GraphQL Server also supports all Node.js HTTP server frameworks: Express, Connect, HAPI and Koa.
+Apollo Server also supports all Node.js HTTP server frameworks: Express, Connect, HAPI and Koa.
 
 ### PHP
 
@@ -411,14 +411,14 @@ Executor.execute(schema, query) map println
 ### JavaScript
 
   - [Relay](https://facebook.github.io/relay/) ([github](https://github.com/facebook/relay)) ([npm](https://www.npmjs.com/package/react-relay)): Facebook's framework for building React applications that talk to a GraphQL backend.
-  - [Apollo Client](http://apollographql.com/client/) ([github](https://github.com/apollostack/apollo-client)): A powerful JavaScript GraphQL client, designed to work well with React, React Native, Angular 2, or just plain JavaScript.
+  - [Apollo Client](http://apollographql.com/client/) ([github](https://github.com/apollographql/apollo-client)): A powerful JavaScript GraphQL client, designed to work well with React, React Native, Angular 2, or just plain JavaScript.
   - [graphql-request](https://github.com/graphcool/graphql-request): A simple and flexible JavaScript GraphQL client that works in all JavaScript environments (the browser, Node.js, and React Native) - basically a lightweight wrapper around \`fetch\`.
   - [Lokka](https://github.com/kadirahq/lokka): A simple JavaScript GraphQL client that works in all JavaScript environments (the browser, Node.js, and React Native).
   - [nanogql](https://github.com/yoshuawuyts/nanogql): Tiny GraphQL client library using template strings.
 
 ### Swift / Objective-C iOS
 
-  - [Apollo iOS](https://www.apollographql.com/docs/ios/) ([github](https://github.com/apollostack/apollo-ios)): A GraphQL client for iOS that returns results as query-specific Swift types, and integrates with Xcode to show your Swift source and GraphQL side by side, with inline validation errors.
+  - [Apollo iOS](https://www.apollographql.com/docs/ios/) ([github](https://github.com/apollographql/apollo-ios)): A GraphQL client for iOS that returns results as query-specific Swift types, and integrates with Xcode to show your Swift source and GraphQL side by side, with inline validation errors.
   - [GraphQL iOS](https://github.com/funcompany/graphql-ios): An Objective-C GraphQL client for iOS.
 
 ## Tools