Fixed White House log peeves

* Added single name search ("When has Beyonce been to the White House?")
* Added support for Unicode (should fix #14 )
* Made date parsing tolerant of dates without times
* Reverted date format to match the format in other queries (m-d-y), see above for why this was an issue
* Prevented simple match from triggering in complex cases (no more additional "Couldn't find" result)

etc.