yacreader/compressed_archive/libarchive

* Introduction

TODO

* Using

qmake CONFIG+=libarchive

* Supported Archives

TODO

* Limitations

TODO

v4 solid archives, slow 7z, etc.

libarchive is stream based so it reads the archive in linear order. talk about
advantages of properly ordered archives (1.jpg..10.jpg vs 01.jpg..10.jpg)

* Future Work

fallback to unarr for v4 solid archives?