Update README.md

Fix for #7

Merge pull request #11 from galactic-apps/master

Fixed call from config.SHOPIFY_SHARED_SECRET to sharedSecret constant.

Remove duplicate app.use() calls to bodyParser.json()

Fixed verifyHmac logic for Webhooks, added .idea/ to .gitignore

Fixed typo

Readme

Docs and readme

perspective scroll

remove smooth mouse scrolling

Merge branch 'master' of https://github.com/Elkfox/shopify-node-app

More docs

Initial build and some docs

Update package.json