v1.6.0: look ma, no SD card

What's new?

• SD card dependency has been removed. (CLI only)
  • Fixes #10
  • You can now apply a custom ROM path that is different from the input ROM using -p <ROM path>
    • This path must follow POSIX standards. This may be improved in the future.
• Unique ID is no longer based on the title's gamecode.
  • Fixes #20
  • Unique ID 0xFF400-0xFF7FF is allocated for YANBF.
  • A new id.txt file is created and is used as a counter for Unique IDs.
    • Should this file be lost, you may potentially start replacing older forwarders. Which isn't a huge loss, but annoying nonetheless.

Improvements

• Some reworking of the code. Not visible to the end user, just made the thing more maintainable really.
• libscrc has been replaced with a custom CRC16 function
  • GBATEK swiCRC16 pseudocode provided by nocash. Thanks nocash!

Bug fix

• The GameTDB access will ping the EN endpoint if the album artwork is not found on the correct region.
  • Apparently this is intended behaviour. Weird but oh well, another ping isn't taxing.

Known issues

• As is standard for YANBF releases, the GUI is always one step behind in functionality. So passing a custom ROM path will not work for now.
• DSiWare is not supported, as GameTDB does not provide box art for them (of course they don't, they don't come in a box.)