add Trainline

[derhuerst]

I couldn't find an option to delete the account within the "my account" page.
I have asked the customer support to delete it via https://support.thetrainline.com/en/support/tickets/new .

[tupaschoal]

@derhuerst this repository has been abandoned years ago. Check out our forked and maintained one at https://github.com/jdm-contrib/jdm