Formatting and use of File.separator instead of platofrm dependent \\
FolderZipper takes a folder and creates a zip file from it by adding
each file of the provided folders root to the root of the provided
zip-file
Unzipper replaces the content of the provided folder folder with the
content of the provided zip-file.
VisualistaEditor is updated to use zip-files for saving and loading the
novel.
Removed unneccesary logging.
Merge branch 'develop' of https://github.com/Visualista/Visualista into develop