On todo-databinding, remove logic from layout files and use Custom Setter

I read the previous discussion #72 and understand the approach, but most layout logic could be replaced with `@BindingAdapter` annotation and people could see their power, one example

``` xml

```

could be replaced with

``` xml

Start by reading the previous discussion in issue #72 and locating the existing logic in the layout files. Compare that logic with the proposed BindingAdapter examples; the work is complete only when the agreed layout behavior has been moved to custom setters with a settled scope.

Written by the indexing model from the issue text.