fpcalc results should be cached preventing regeneration

[sbarnea]

Fpcalc results should be cached preventing regeneration if the file was not changed.

That's a essential requirement for using it in a media center where you use symlinks to generate the the browsable directory structure.

Without this feature the processing would take hours and hours.

[rednoah]

filebot shouldn't be run on files you have already processed in the first place

You're wasting the free AcoustID webservices unnecessarily!!!

EDIT: FileBot imposes a 3 requests / second flood limit on AcoustID usage. So this is the bottle neck, not the fpcalc call. And the requests are already cached 2 days / 20k items max. I guess I can increase that.

EDIT2: With FileBot r2266+ caches for AcoustID webservices are now set to 2 months / 200k items