AdminController: double escape on export, unfix on import
AdminController: double escape on export, unfix on import

This ensures that intentionally escaped entities will be preserved by
the export process, and that all escaping done for export will be
undone on import; improved conformance to Atom spec by setting an
appropriate type for post export content; doing a cleaner XML to array
conversion on import.

xenocrat/chyrp-lite,xenocrat/chyrp-lite