some work on updating photo threads for Red
Merge branch 'master' into photothread
port superblock core code (except Red will use an xchan instead of a URL)
Merge https://github.com/friendica/red into zpull
more directory sync stuff
add some debugging - update times are changing much faster than they're supposed to.  Log what has changed.
fix broken profile syncing
don't try and load an empty string as a photo
Merge branch 'photothread'
change the way profiles are imported
change plugin_install to plugin_load, etc.
smarter handling of js_upload source param
members_of_group() output not entirely correct
incorrect comparison operator