update

- removed old ExtendedInfo widget
- accessor package for different object accessing implementations under
AccessibleValue interface
- Config now AccessibleValue
- Config now doesnt return success flag on setValue
- simple AccessibleValue & WritableValue implementation Accessor
- Accessor now widely used for Configs requiring applier method
- all widgets' configs now react on config change
- Library remembers last open location
- Library remembers view
- various widget improvements & code enhancements