##Usage
require(['knockout', 'knockout.localstorage'], function(ko, knockoutLocalStorageObservableFactory) {
function ViewModel() {
this.savedObservableInLocalStorage = knockoutLocalStorageObservableFactory.observable('my_key', {
defaulValue: 'my_value'
});
console.log(window.localStorage['my_key']);
//output: 'my_value';
}
ko.applyBindings(new ViewModel());
});