Version 4.0 - first draft for Python3 conversion
Merge branch 'master' into python3
Merge branch 'master' into python3
Merge master into python3
Merge branch 'master' into python3
Updated rarfile
Added proper startup scripts

Hacks that allow standalone startup of script inside module are messy.
Bucket of various tweaks
And one more bucket...
Preliminary QT5 update
Moved dependiences check out of module
Bucket #3
Full UTF-8 awareness (close #74)

Tested only on Windows. But he had the biggest problems with it.
Fully implemented new slugify library
pdfjpgextract: Python3 update
kindlesplit: Python3 update
Dropping unnecessary debug
Fixed multi-instance lock
Manga mode is now always available (close #78)
Added drag & drop support