Added Swift Examples
Added Swift Examples

and removed the random Java (ಠ_ಠ) example

ayunav/firebase-simple-login-objc,googlearchive/firebase-simple-login-objc,ayunav/firebase-simple-login-objc,googlearchive/firebase-simple-login-objc,ayunav/firebase-simple-login-objc,googlearchive/firebase-simple-login-objc