Import participants feature

[VKronmar]

I've previously worked with a bunch of different ticketing and guest management software, and in many ways this is a more flexible tool. However there's a few thing I feel are missing. Here's a few that i'd like to see :).

• Would love a feature to import participants via csv or excel, with the option of giving them a ticket or just to be able to send invites.
• Ive seen discussions about short codes, I'd just like mention them again. Would be great to personalize email with names.
• Cancelation links, adding a cancelation link in the confirmation or with a shortcode.