remove old windows 7z binaries and Inno Setup Script ISS (#575)

* Delete 7z.dll

* Delete 7z.exe

* Delete Additional-LICENSE.txt

* Delete InstallWarning.rtf

* Update kcc.iss

* Update kcc.py

* Update .dockerignore

* Delete kcc.iss

.dockerignore

@@ -7,8 +7,7 @@ KindleComicConverter.egg-info
 .gitignore
 .travis.yml
 Dockerfile
-other
 venv
 *.md
 LICENSE.txt
-MANIFEST.in
+MANIFEST.in