Chunks the output buffer to 4kB chunks. This means the Download.php
script will no longer run out of memory when trying to stream a
tar file the output buffer.
The ConfirmDelete page now uses parts of the photopage. The
Confirmation dialog is its own template which is based on Alert.
The database now updates the album thumb to the most recent
addition to the album, when the album thumb asset is being deleted.
When there are no pictures left in the album 0 will be set.
Roflin