MatrixMarket Improvements; Libarchive failed attempt

-MatrixMarket: back/forward buttons, progress bar, mouse navigation,
download manager for .tar.gz .mtx files
-Libarchive: added source code; QMake support; basic file opening test -
failed for .gz files...
Libarchive in CMake - failed attempt
Fun with poorly documented C libraries

I hate C. I hate poorly documented libraries.