Whoops, didn't update

Ok, added embed_original, an uncommented version of original.html
(formerly phone-frame.html) and added a main page where users can
select the code to paste onto their site. They can also customise the
web address, and this will show up on the live preview and the embedded
section.
I also fixed a bug I’ve been stuck on where users couldn’t change the
website after they initially set it (see oldEmbed with display:none in
index.html)