How can a DM create there own library to share to players? Is it just a easy zip of all the assets? Or, use the zip from the export campaign?
I'm guessing that b60 adds the ability for the GM to upload a ZIP of all the assets, then the player can specify the URL of that ZIP in MapTool. MapTool automatically downloads and unpacks the ZIP, automating the process that has been described elsewhere on the forum.
It's basically a more "batch" version of the repository. When using a campaign repository, only the individual assets are downloaded and cached and only when needed. This downloads the whole thing and unpacks it immediately.
Weirdness with b59 and b60: when a client connects to the server and navigates to a map with assets that are not Visible to Players, they don't see the assets ... until they disconnect from the server! On my system running two MapTool clients on the same machine, the assets they're not supposed to see are only visible for a fraction of a second. But it's enough to get a general idea of the layout of a map.