Add option to check if whole object is changed in form autosave

[ptanov]

#10

add option
var previous = $parse(attrs.seFormAutoSubmitModel)(scope);
SeEventHelperService.whenChanged(scope, attrs.seFormAutoSubmitModel, function(newValue, oldValue) {
if (previous !== newValue) {
// if the whole object is changed - this is not made by user input, but by something else - do not update on server
previous = newValue;
return;
}