Renamed RootBindingBuilder.rwroot to RootBindingBuilder.outputReadWrite.
Renamed RootBindingBuilder.roroot to RootBindingBuilder.outputReadOnly.
Added ShowIfTrue (similar to ShowIfExsists)
Modified doFocus to call setFocus if value is true on initializeEvent.
Updated TodoMvc to use ShowIfTrue for the edit, this reduces the number
of active bound values.