early return on IsSubset and IsSuperset which saves iterating through the whole set.  Good catch JohnStow on: http://www.reddit.com/r/golang/comments/1hlijg/a_simple_set_type_for_the_go_language/
early return on IsSubset and IsSuperset which saves iterating through the whole set.  Good catch JohnStow on: http://www.reddit.com/r/golang/comments/1hlijg/a_simple_set_type_for_the_go_language/

tonycoming/golang-set,Vector919/golang-set