refactor(kff.TextBinder, kff.HtmlBinder): optimize DOM manipulations
refactor(kff.CheckBinder, kff.RadioBinder): optimize change event handler

Remove setZeroTimeout async helper and make change event handler synchronous. Bind checkbox only to click event, not change event.
refactor(kff.BindingView): use kff.arrayIndexof function instead of manual for loop
refactor(kff.BindingView): scheduled batch removing of bound views (experimental)
refactor(kff.BindingView): reverted scheduled batch removing of bound views
refactor(kff.EventBinder): remove timeout when updating model value
refactor(kff.FocusBlurBinder, kff.DisabledBinder): remove timeout when updating model value
test(kff.CheckBinder): update test according to the new behavior

Check binder now reacts only to the click event.