threaded with  1 I/O Thread

Signed-off-by: Daniel Dahlkvist (dice) <daniel.dahlkvist@dice.se>
improved performance to ~14s

Signed-off-by: Daniel Dahlkvist (dice) <daniel.dahlkvist@dice.se>
optimizing some more...
no crash when running on big folder and big files

Threading part - DONE!

Signed-off-by: Daniel Dahlkvist (dice) <daniel.dahlkvist@dice.se>