Extending Dates Role's Vague String handling & Fixing #346

I've extended the handling in order to support the functionality required to fix https://github.com/duckduckgo/zeroclickinfo-goodies/issues/346

> I don't see how we could get access to the client clock 

On this note, we do the `$loc` thing in the `CalendarToday` goodie to try to figure out which day it is in their timezone.  So it's not infeasible, just of questionable utility (imo.)