fix/add support for 4K (and other non 1K) card sizes in hf mf commands

- hf mf rdsc (fix): didn't account for 16 block sectors, allowed max sector 63 instead of 39
- hf mf ecfill (add): added (optional) card size parameter and support for non 1K cards
- hf mf dump (add): added (optional) card size parameter and support for non 1K cards
- hf mf dump (fix): Access Condition 011 not handled correctly (tried to access with key A)
- hf mf restore (add): added (optional) card size parameter and support for non 1K cards
- hf mf nested (fix): didn't account for 16 block sectors, allowed max sector 63 instead of 39
- hf mf nested (fix): always dumped 16 keys to dumpkeys.bin instead of correct number
- hf mf chk (fix): always dumped 16 keys to dumpkeys.bin instead of correct number
- hf mf eget (fix): displayed three instead of one block
- hf mf eload (add): load 4K .eml files (but accepts 1K .eml files for backwards compatibility)
- hf mf esave (add): always save the whole emulator memory (4K) instead of 1K only
- hf mf ecfill (add): added (optional) card size parameter and support for non 1K cards