Add Event.tieAssign, Event.sweepsAssign, and getters

Addition to constructor forthcoming.
Add Event.tieAssign and sweepsAssign to constructor

Eclipse refactoring is awesome: by updating the code in
EventConfigParser, my code remains syntactically consistent, even though
I'm probably going to throw away the defaults it assigned in
EventConfigParser in my very next commit.
Add tieAssign and sweepsAssign to config file parsing