Jump to App's main page in App Store

jumpToAppStore.swift

// See http://stackoverflow.com/questions/3124080/app-store-link-for-rate-review-this-app
func jumpToAppStore(appID: String) {
  let url = "itms-apps://itunes.apple.com/app/id\(appID)"
  UIApplication.sharedApplication().openURL(NSURL(string: url)!)
}