self serving for basis.Token and basis.data.DataObject with bindingBridge in binding implemeted

BEFORE:
```
var node = new basis.ui.Node({
...
binding: {
caption: function(){
return basis.l10n.getToken('path.to.token')
},
amountSum: function(){
return dataset.getIndex(basis.data.index.sum('amount'))
},
...
}
});
```
AFTER:
```
var node = new basis.ui.Node({
...
binding: {
caption: basis.l10n.getToken('path.to.token'),
amountSum: dataset.getIndex(basis.data.index.sum('amount')),
...
}
});
```