Updated to 2014/08/26 development build
* Added read-only YU-RIS YCG image format support (requested by ZS)
* Added full YU-RIS v4.90 archive sub-format support and fixed bug in v3.00 creation algorithm (requested by ZS)
* Added experimental read-only Nitro+ NPA archive format support (Chaos;Head only, ported from NIPA sources by Nik)