[#124] Clean up in Stuff
[#93] Support safe access to members that requires get them throgh long path
[#123] Move all extensions to Stuff namespace
[#122] Extract some additional methods from Category to extensions
[#121] Support IdAttribute for use when need specify just an identifier
[#120] Remake Event system struct to DOM
Forgotten files fro delete
[#85] Change Implentation namespace to Private Edit