Enhanced form examples to utilize $touched

The "Binding to form and control state" example now more closely reflects how users will accomplish form validation in 1.3. For example, users are now informed of validation requirements upon clicking Save.
I know. But the text is still not clear
> Custom error message displayed upon interacting (touching) a field

For somone who doesn't know angular this sounds like the class will be set immediately on interacting or touching the input. Interacting is misleading, touching is ambiguous.