Add a launch screen

[sayanee]

https://developer.apple.com/library/ios/recipes/xcode_help-image_catalog-1.0/chapters/AddingLaunchImagestoanAssetCatalog.html

[cheeaun]

I think would be better to use storyboard as launch screen instead of static images. Reference: http://oleb.net/blog/2014/08/replacing-launch-images-with-storyboards/