Installing graphiql to moya.

• git clone https://github.com/graphql/graphiql.git /tmp/graphiql
• cd /tmp/graphiql && npm install && npm run build
• cp graphiql.js graphiql.css examples/index.html ~/moya/code/moya-web/WebContent/graphiql
• Modify index.html
  • Change graphiql.js and graphiql.css paths in header
  • Change graphql path to /MoyaWeb/graphql