* DDSEncoderType, DX10DXGIFormat merged with DDSType for a single way to describe a DDS format
* Added constants for DXGI formats
* DDSImageWriteParam is now mutable and supports standard way of setting compression type
* DDSImageMetadata now supports more of the format
Performance:
* DDSReader now use seek() to jump to correct mipmap instead of reading all bytes
* DDSImageWriter now uses getTile(0, 0) instead of getData() for better performance
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