validation messages in tooltips

Implementation of two kind presentation of validation messages:
- in tooltips 
- in p-tag under the input field

In both case validation message disappear on click, keydown, change and blur events of invalid input.

PS I think ParametrizedFunction is useful class and should be moved into wicket-jquery-selectors (I wrote the todo in javadoc).
In latest wicket-jquery-selectors (v.0.1.4) there is an interface `de.agilecoders.wicket.jquery.Config` that better suits this check.
There is also `de.agilecoders.wicket.jquery.JQuery.ConfigurableFunction` that looks similar to this.
Latest Wicket-Bootstrap master branch already uses jquery-selectors 0.1.4