added docs + amending git screw-up

removed unused fn getMoves

Merge pull request #4 from ferdinandhubbard981/refactoring

final cleanup

helper function cleanup

somewhat cleaned up advance

refactored first part of advance

refactored getPlayerTickets to use lambda

removed unnecessary asList call

changed getDouble/SingleMoves to return ImmutableSets

refactored getSingleMoves

removed some unn. comments & refactored mrX win condition

moved duplicate code into helper function

merged duplicate detective & overlap test into one loop

removed excess comments