Add support for defining scenes by exclusion
refactor wip
Move Actor to object
Reimplement data-default-scene
Reimplement attribute toggling
Add 'all' keyword
Remove old code
Refactor all keyword feature
Support for bang exclusion
Clean up keyword scene implementation
Implement toggle keyword
Remplement basic callback
Fix shared 'all' behavior, add sessionstorage
Simplify plugin loop
Update documentation
Mark files as 0.5, add plain files
Update changelog and package file