timeString: always plural

[ghost]

1 secs -> 1 sec.

[zajrik]

I will likely provide a localization string that accepts all the fields from a Difference object, allowing localization of this output. I won't be able to take care of this for a while, potentially. I'm waiting on my laptop to come in from repairs, and I'm hoping to do a major overhaul of the localization backend soon.

But when I do allow this to be localized, I'll make sure the base template script accounts for proper pluralization.