Automatically update access info when saving uploaded file.
Implemented setContent (as saveContentXml) for XML API.
Refactoring; made Lucene indexing on file upload configurable.

 (if an OSD is modified in several places during a request, it does not need to be indexed a second time after storing file data).
Implemented setMeta XML API command.
Implemented setSysMeta XML API command.
Fixed command names.
Update command list.