AttributeUtils bug fix
[#78] forgotten
[#78] Support multy attributes
[#77] Improve XmlSerializer: if IList property is not null when deserialize, then deserializes items just adds
XmlSerializator bug fix
[#76] Composition object could not found a composition part for none-composition parts
[#75] Create composition manager method that will detect that specified object is composite
Generic XmlSerializer
Remoe obsolete implementation system XmlSerializer
[#74] Create XmlSerializer
