* Modified the parsing procedure to upload into FS also those files in the UoL ZIP that are not referenced as resources in the imsmanifest. All images and additional files linked from an HTML page were not uploaded because they do not appear as resources in the manifest.
* Fixed a few bugs when handling file properties. Also, personal properties are now created in a sub-folder in the FS to facilitate its identification.
- adding support for properties of type file * providing upgrade scripts - adding monitor service of the properties - fixing bugs - adding a constraint on the evaluation of the conditions avoiding infinite loops - now the files of the UoL can be updated/changed from the file-storage UI