new function: ::content::revision::export_to_filesystem
This change moves functionality from file-storage to acs-content-repository. all ap…
new function: ::content::revision::export_to_filesystemThis change moves functionality from file-storage to acs-content-repository.all application packages should be free of internals, such as the storagetype. Storage_type should be handeled in the content-repository package.We are not yet done, there is still more to do in this respect inthe file-storage package.