fixed contact example

Clear dirty codes

Merge branch 'master' of https://github.com/smithaitufe/go-graphql-upload

Used channels and WaitGroup to enhance the performance of file operations

Update README.md

Added example and README

Modified the readme file

Added example to demonstrate how to use the go-graphqlupload package

Implemented the middleware. Handles single operations correctly. Renamed graphql_upload_scalar to scalar.go

Defined graphql Upload scalartype

Added dependency management using dep

Initial commit