refactor(kff.BindingView): use direct DOM fragment manipulation instead of jQuery.after
refactor(kff.ClassBinder): use native DOM classList methods with fallback to jQuery
fix(kff.BindingView): check for parentNode before calling insertBefore (due to a weird IE bug)
refactor(kff.Binder, kff.BindingView.js...): performance tuning of binders cloning
feat(kff): add methods mixins2 and createObject for critical performance operations
refactor(kff.View, kff.BindingView): replace some jQuery functions with direct DOM operations
refactor(kff.View): eliminate mixins calls where possible, use shared options object when cloning views

In heavy apps with ten thousands of bindings, mixins can be serious bottleneck. This patch can speed up rendering by 25 %.
refactor(kff.BindingView): optimize rendering of bound views
refactor(kff.View): remove redundant this.options definition in constructor