Short circuit && || operators in bindings

Bindings parser can now handle negative numbers inside parenthesis op…

…erations

Change mixin scope when using sub-mixins

Don't save on url in older browsers

enable/disable bindings add disabled attribute to select elements

Fix throttle

Check for null/undefined in value binding when the property starts wi…

…th a null/undefined

Check for null/undefined in value binding

ViewModel.property.array is now reactive

* Fix array validator

* Lower ecmascript version