About the file uploads, basically the steps above don't cover migrating those files to the new installation, although it should be pretty straightforward to copy these.
If users upload avatars, or if files are uploaded to courses (there are most probably other ways to upload files as well), these will be written to the disk (in
In any case, for now, if you want to migrate, just follow the steps posted above and you should be fine, but don't forget to back up any installation before proceeding. Then, if you find missing files, you can just copy them from one installation to the other respecting paths (e.g.
old-installdir/apps/edx/var/1 -> new-installdir/apps/edx/var/1).
About the Ginkgo.2, the stack is finished, and we're currently working on releasing it, but we found some issues in our release process that have prevented it from getting out. Hopefully it should be released before tomorrow morning.