Text invited friends with a link they can click to get custom phone callback

Adding support for texting friends, since realistically they may not
answer or we may decide it's better to start with a text message.
Fixed typo on sending message param
Argh - should work now pushing to heroku
Created invite page and changed flow so creating a lovebomb calls the creator to record a first lovebomb message, and then lets them copy & paste a link to their friends over text or email. This is called the "invite" page