- Add 3rdparty/astc with lib version of the standard encoder
- Add astc_compress call for ASTC formats
- Add BIMG_CONFIG_ASTC_DECODE-gated decompression support. This is just for
testing, the decompress code is currently too heavy to include in the core lib.
- Add fourcc support for DDS decode so ASTC and other formats not covered by
dxgi can be read
- Add --formats option to texturec, lists all supported formats
- Update genie files -- add astc to bimg_encode and remove redundant files from
texturec
