expanded both #uncles_and_aunts and #nieces_and_nephews methods to take detailed options for inputs
added uncles and aunts methods that pass options in #uncles_and_aunts
added methods with set lineage options for uncles and aunts
added nephews and nieces methods in same vein and aunts and uncles
added a cousins method that utilizes #uncles_and_aunts
new tests for new methods, uncles, aunts, cousin, nieces, nephews. Also added a new person to help tests
removed trailing whitespace