Add disableValidateOnXxx settings

[er314]

What : New config. settings, for allowing to selectively disable one or more event handlers, on blur, and/or on input, and/or on click, and/or on submit.

Rationale : Allow to solve some use cases :

• disableValidateOnInput
  Allow to disable the validation & error refresh on each user keystroke.
  Showing & refreshing errors on each user keystroke may be seen as annoying to some users, so the ability to disable it can be useful. (this is the use case which I have a use for).

• disableValidateOnBlur, disableValidateOnSubmit
  See pull request Add validateOnBlur, validateOnSubmit settings and publicAPIs.showError and publicAPIs.removeError` #55 for use cases.

• Another example use case is when willing to have minimal interference towards user, by performing client-side validation only when user submits the form -> this can be configured with the combination of disableValidateOnInput + disableValidateOnBlur + disableValidateOnClick.