version 0.9.4:

- Modified alpha plane encoding to allow progressive display and
  streaming encoding. This change is incompatible, so images
  containing alpha from the previous versions of the format cannot be
  decoded.

- Added 4:2:2 and 4:2:0 chroma formats with MPEG2 chroma sample position.

version 0.9.3:

- Fixed small palette PNG.
- Added support for BT 709 and BT 2020 YCbCr.
- Added limited range color support.
- Changed CMYK signalling.
- Added premultiplied alpha support.
- Specified the output RGB color space if no color profile is present.
- Reduced the size of the js decoder.
- Removed buffer overflows.

version 0.9.2:

- Fixed encoding of paletted PNG.
- Reduced memory usage in the decoder.
- Added faster 8 bit only Javascript decoder.
- bpgenc: added '-e' option to explicitely select the encoder.
- bpgenc: set default bit depth to 8.
- bpgenc: added lossless support with x265.
- js decoder: handle width and height attributes.

version 0.9.1:

- Added new meta data tags: ICC profile, XMP and thumbnail.
- Disabled metadata copying by default.
- Use same chroma pixel position as JPEG for 4:2:2 and 4:2:0.

version 0.9:

- Initial release.