- Update to version 2.1.0. 
  * Added
    * Two new C++ classes (jpegls_encoder \ jpegls_decoder) have 
      been added to make it much easier to use CharLS from C++
    * A new C API (charls_xxx functions) was added to provide a 
      more stable ABI for future updates. The old API calls are 
      internally forwarded to the new API.
    * CharLS can now read and write JPEG-LS standard SPIFF headers
    * Support has been added to detect the unsupported JPEG-LS 
      extension (ISO/IEC 14495-2) SOF_57 marker and IDs in LSE 
      marker
    * Support has been added to encode\decode 4 component images 
      in all interleave modes
  * Deprecated
    * The legacy 1.x\2.0 C API has been marked as deprecated. This 
      legacy API will be maintained until the next major upgrade.
    * Future 2.x updates will start to mark the legacy types and 
      functions with the C++ [[deprecated]] attribute.
  * Changed
    * charls_error has been replaced by a C++11 compatible 
      jpegls_errc error code enum design
    * The included C and C++ sample have been updated to use the 
      new C\C++ API
    * Improved the validation of the JPEG-LS stream during 
      decoding
    * The referenced NuGet packages of the .NET wrapper assembly 
      are updated to their latest versions
  * Removed
    * Support to write JFIF headers during encoding has been 
      removed. JFIF headers were already skipped when present

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