added: multiple input formats, including RF64, Wave64, and CAF
added: lossless DSD audio in Philips DSDIFF and Sony DSF files
fixed: seeking in > 2GB WavPack files (new stream reader)
fixed: accept > 4GB source audio files (all formats)
improved: increase maximum samples from 2^32 to 2^40
added: block checksums for robustness to corruption
added: support for non-standard channel identities
removed: support for legacy WavPack files (< 4.0)
added: block decoder for streaming applications
fixed: many small fixes and improvements
added: all new pdf documentation
* fixed: corrupt mono or multichannel files created with assembly code (rare)
* fixed: building on Clang systems like Darwin and FreeBSD (req. Clang 3.5+)
* fixed: explicitly sign-extend audio data (< 4-byte) to avoid corrupt files
* fixed: rare decoding errors due to integer overflow (ARM assembly code)
* added: assembly optimizations for "extra" mode on mono or multichannel
