* `header in object` should be a sufficient condition. The suggested
`String(object[header])` wasn't passing the original tests - it caused
keys that didn't exist on the object to be inserted as
undefined. Checking if the key is in the object allows for falsy
values, while preventing keys that haven't ever been set from leaking
in.
* Should close issue #6
* https://github.com/abdennour/react-csv/issues/6
Commas inside of an element were not supported as the element in the data source wasn't being wrapped in quotes. Wrapping the element in quotes before joining should resolve the problem.
