added three test cases for issue #14 with JulianDay
added three test cases for issue #14 with JulianDay

onekiloparsec/SwiftAA,alex-vasenin/SwiftAA,onekiloparsec/SwiftAA,alex-vasenin/SwiftAA,alex-vasenin/SwiftAA,alex-vasenin/SwiftAA,alex-vasenin/SwiftAA,onekiloparsec/SwiftAA,onekiloparsec/SwiftAA,onekiloparsec/SwiftAA