rewrite entirely flatten : add _foregrounds. much more optimised
work on deep.all signature
remove sheet auto application in up and bottom. clean order of merge
work on deep.all signature
cleean deep-sheeter and add query
clean dom-sheeter
clean and follow sheet refactoring
work on deep.sheet with multi args
clean
apply store-sheet with deep.sheet
follow refactoring in units
rewrite directives managements. use dom-sheeters and parseDirectives
update docs + routes
clean + js-lint