Created Level4 by copying level2 storyboard. Added template for Level 4 tests. Need to add iPhone.
Added iPhone image, addd segue on main, added check for password of "1234"
Level 3 updated to segue to level 4,  hint added for level 4
Level 4 tests added and passed
Merge pull request #39 from zsweedyk/Level4

Level 4 with some changes to Level 3