Support h:file includes in content import resource XML files for binaries

It would be also great if we support the following feature as well:

• To allow to use h:file="binaries/bin001.bin" even in normal content xml files (not only in foo.zip!esv.xml)
• A story: As a developer, I want to store a binary (or text possibly later for freemarker template for instance) into a separate file with keeping the link in content xml without having to compress everything into a zip file (see REPO-883) in source.