Fixed iPhone 6 Plus splash file names

Titanium doesn't consider Default-Portrait-736@3x.png and Default-Landscape-736@3x.png names (_without_ the trailing "h" after "736")  to be valid, and it doesn't reference them in the generated info.plist file. This should fix the issue
Merge pull request #16 from omorandi/master

Fixed iPhone 6 Plus splash file names