Revert "change in thumbnail generator"

This reverts commit 0be6e5078703ab03485f6ef5cb26c65ed88a2474.
Revert "test"

This reverts commit 91480a0ac445137274db528e318c84c22937ff5e.
Revert "test"

This reverts commit a75a5edcf122eb0666c0063a45780de21334d190.
Revert "first commit"

This reverts commit 7f7ddd01022d8de8df805ad1dad93f27b045764d.