Revert "Add comment with Atlas ID for items, and fix the ApplicationSpecificData"

This reverts commit 535b31f19949a1ef92a816f5d5bd7b8da504fe99.
Revert "Change IDs for seasons, use '/' as a separator for season/series"

This reverts commit ad28d58c671b597295534343a7280c3271404916.
Revert "Change ItemID for episodes to base from applicationspecificdata"

This reverts commit 5efdff570093539d2e431240d14ed627cc6df702.
Revert "Episode ItemId is based on asset IDs"

This reverts commit f3242294bc685171da556f8fbf7c65e8e2f0b605.
Revert to old item id format