Add debug option to new()

Signed-off-by: Pedro Melo <melo@simplicidade.org>
Add progress to new() options

Signed-off-by: Pedro Melo <melo@simplicidade.org>
Upgrade failed fork() to _error

Signed-off-by: Pedro Melo <melo@simplicidade.org>
Tidy

Signed-off-by: Pedro Melo <melo@simplicidade.org>