JS zip libs

js_zip_libs

[gzip-js](https://github.com/beatgammit/gzip-js)
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* Implementation of gzip
* Does not expose underlying deflate algorithm
* Very limited
* Most recent commit ~1 year ago

[pako](http://nodeca.github.io/pako/)
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* zlib implementation: deflate, inflate, etc.
* Low level
* MIT License
* Most recent commit ~2 weeks ago

[jszip](https://github.com/Stuk/jszip)
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* High-level API for reading/writing zip files
* Depends on pako for low-level operations
* MIT, GPLv3 (dual licensed)
* Most recent commit ~2 weeks ago

[zip.js](http://gildas-lormeau.github.io/zip.js/)
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* Built-in web worker support. Callback-based API
* Blob support
* Provides 2 sets of APIs: low-level (Inflate, Deflate, zip) and high-level (filesystem-based zip file manipulation)
* BSD License
* Most recent commit ~1 year a go