[del, add, chg] new classes, renamed classes
[chg,add,del]new classes, renamed classes, new inner structure
[del] deleted obsolete files from version 37 and older
[chg,add,del]new classes, renamed classes, new inner structure
[fix] minor fix
[fix] minor corrections
[chg,add] copyright years changed, minor changes, namespaces change, interfaces change
[chg,add,del] copyright years changed, interfaces changes, namespaces change