Suggestion: Add Loading Progress Indicator

[jefflinwood]

If you add a loading progress indicator to the view controller, it will show the user progress while downloading.

I suggest using SVProgressHUD (https://github.com/samvermette/SVProgressHUD) to show a progress indicator if there is no data to load, and then to dismiss it when the rows of data load.

[vivekvpandya]

As far as this network activity indicator is concern and If we talk about TipViewController class than all fetching of data is already done when we do segue (unless there is already an error has occurred) but In future extension we can consider as project progress and we need to load something like comments related to a node etc. And instead of using any third party library for this I will try to use native api i.e UIActivityIndicatorView first.