[#126] Create ability to set simpleinit object inInit and InvokeApp AppManager methods
Remoe old tests
[#88] Make would be to not specify a singleton identifier
[#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
