*Implemented 'cellGifDec', using 'sys_fs' to access the files and the
'stb_image' (stblib) library to decode GIF buffers to Raw-pixel buffers
that can be used as textures.
*Replace 'lodepng' and 'jpeg-compressor' libraries with 'stb_image' in
cellPngDec and cellJpgDec, respectively.
*Fixed minor issues in cellPngDec and cellJpgDec.
*Replaced "sys_jpgdec" with "cellJpgDec" in
"rpcs3\Emu\SysCalls\Modules.cpp".
*Implemented 'cellJpgDec', using 'sys_fs' to access the files and the
'jpg-compressor' (jpgd) library to decode JPG buffers to Raw-pixel
buffers that can be
used as textures.
*Fixed memory leak issue in cellPngDec and minor changes.
Implemented 'cellPngDec', using 'sys_fs' to access the files and the
'lodepng' library to decode PNG buffers to Raw-pixel buffers that can be
used as textures.
