README.md: Replace 'quantity_ordered' with 'quantityOrdered'
README.md: Replace 'quantity_ordered' with 'quantityOrdered'

Change made with:

  $ sed -i 's/quantity_ordered/quantityOrdered/g' *

Because JavaScript style conventions seem to prefer camelCase [1].

[1]: http://jscs.info/rule/requireCamelCaseOrUpperCaseIdentifiers

azurestandard/azure-angular-providers,azurestandard/azure-angular-providers