it has to solve a few problems like:
1. blocking the current thread while listing, extracting or adding to
archive
2. lack of support for some archive formats such as 7-zip in the
previously available classes for dealing with archive
3. progress and error reporting
a KArchiveJob class may have to be implemented to solve the above
issues. the API is just as frustrating to use as KTar and KZip right now
tho and I am not happy with that but the class itself is a 3-rd rewrite
of what was once Python module, plugin for another project and now used
as base in library.
Signed-off-by: Ivailo Monev <xakepa10@gmail.com>