Merge pull request #176 from williamboman/fix/iOS-select-text

mimic readonly behaviour on inputs on iOS for a better interaction experience

Add HTTPS-only announcement

Automatically replace `master` with latest commit hash in CDN URLs

Also ditched ancient browser compat in url-format.js.

Look up raw gist URL via the API when a non-raw URL is pasted

People had a lot of trouble with this since it wasn't obvious that
RawGit needed the raw gist URL (and the raw gist URL couldn't be
derived locally from the non-raw URL). Hopefully this makes it easier.

One more CDN bump.

Bump CDN tag.

Unbreak copy buttons.

I'm a doofus.

Bump CDN tag.

Bump CDN tag.

Always use HTTPS URLs.