Add "Generate Empty Dir" option

[broshet44]

Hello

As part of a migration with your tools, we had a problem on empty directories managed by SVN but not by git. Svn-git has a "--preserve-empty-dirs" option to migrate them by placing a generic file.

Are there any plans to implement an option on your tool to use it?

[yodamad]

I'll check when getting back from holidays. Normally it's supported through configuration, I'll let you know quickly

[yodamad]

@broshet44 : u can do this by adding following option when lauching jar

java -jar svn2git.jar --application.flags.git-svn-clone-preserve-empty-dirs-option=true

I'll see to add it on UI also

[yodamad]

Added in v1.22