Transfer metadata by copy / upload / download of zip files, unify copy
of streams, copy metadata during copy of courses, remove backwards
compatibility mode for import

Move the functions of OlatRootFile and OlatRootFolder to the Local
implementations to simplify the use of VFS, implements factory methods
in VFSManager, reduce the number of call to meta informations in folder
listing

Fix deletion of metadata, fix left files by restore of versioned files,
implement restore of metadata of deleted versioned files, implements an
upgrader to delete metadata of deleted resources, courses, groups,
forums, users and temporary uploaded files

OO-3108: close the file system created for zip files, set default encoding to UTF-8 for some stream to string operations

OO-2974: implement a way to understand different identifiers per page (classic page name, initial page name, old page names)

OO-725 implement missing import/export, synchronize posterframe and repo entry image (one way), cleanup api, move things to manager

OO-1640: better detection by scanning the content of glossary and editor tree model, CP check that the resource is not a course...

OO-1446: set expiration date for versioned static file ( and transparent.gif ), refactor Workbook media resource to work without temporary files, add flag to media resources to accept or not ranges, add patch for Tomcat 8 ( thanks D. Haag )

OO-990: fix a case where the SCORM package is not detected if the manifest files is at the root level and a single folder contains the SCOs

OO-990: refactor import of resources in REST API to match the new import mechanism in authoring environment

OO-990,OO-1068: allow import of resources which match several types ( as QTI 2.1 package), bootstrapify Onyx run controller