Update README for worker improvements and zlib-asm/pako.

Update README.md

Update README.md

Update README for worker improvements and zlib-asm/pako.

Add version info of alternative codecs

Update README for worker improvements and zlib-asm/pako.
Coding style improvements

c s improve

Coding style improvements
Improve error handling
Adapt existing tests to the new zip.workerScripts option
Improve parallel reads test (test15)
Create codecs interop test