Add CSS class to CRUD form fields indicating data type

[Mark Schaake]

Please add classes to the input tags auto-generated by CRUD to indicate the underlying datatype. For example:

Java -> CRUD-generated CSS Class
---------- -------------------------------------
Date -> crud_date
Integer -> crud_integer
Number -> crud_number
...

This is helpful when overriding the CRUD/layout.html template by being able to place one jQuery call to attach datepickers, etc.

Also (or maybe alternatively), would be nice to have an annotation available to add custom classes directly from within the model:

public class MyModel extends model {

    @CSSClass("datepicker") // 'datepicker' will get added to the CRUD input tag as an additional class
    public Date birthday;
    ...
}