added time to 'Last Updated' message
added time to 'Last Updated' message

I've used here `stringForObjectValue:` instead of `stringFromDate:`
because it's given as explanation of NSDateFormatter's class method
`localizedStringFromDate:dateStyle:timeStyle:` in apple docs.
FormatterBehavior I've also set as it given in that method.
[#11]

soffes/sspulltorefresh,maoyama/sspulltorefresh,mirego/sspulltorefresh,SuperMarioBean/sspulltorefresh