updating styles IMPORTANT

Just a head’s up. We’ve got some problems:

First, almost all existing styles are invalid as a result of the
recent metadata changes in the schema. I’ve updated the ones in the
Zotero repo.

But … upon committing them, most are still invalid, and not well-formed.

I think the update time-stamp script has a bug. Locally I have
"" but in the repo it’s “<[time-stamp]”.

Dan, can you look into this ASAP?