Ensure a newline is at the end of the file

[danielbayley]

Neither cson2json or json2cson append a newline at the end of the file they generate; shouldn't they default to this behaviour? Or maybe a -newline command line flag if not?

[balupton]

Not sure why they would do this?

@balupton https://stackoverflow.com/questions/729692/why-should-text-files-end-with-a-newline

[balupton]

okie, PR welcome