1. change Helperbar menu creating methods to Helperbar.menu and it will
have more simple API.
2.Helperbar.menu.build() to return compiled menu array
3.change Helperbar.build to Helperbar.buildBar
4.Helperbar.getbar = Helperbar.getBar
1.addTree and addItem have got one more arge 'id'
1.menu.get()  return a copy of object, not reference.