Added the possibility to define a branch or a tag that will be exported.
 --branch SomeBranchFolderName
 --tag v1.0.0AwesomeTagFolderName
config.ini got a new default value "exportVersion", that will be used if neither branch nor tag attribute is set, but its optional.
If also no exportVersion value was define it will always fallback to trunk (in case that SVN mode is configured)