TODO
- add dataset of users.
- adding friend capability.
- Alternate colors for sent and recieved messages.
- Sending images and adding profile pictures.
- How to integrate third party libraries in your app.
- How to store data in the cloud using Firebase.
- How to query the Firebase database.
- How to use Firebase for user authentication.
- How to work with a UITableView.
- How to use custom cells in a Table View.
- How to embed View Controllers in a Navigation Controller and understanding the navigation stack.
- How to create Segues for navigation.
- How to make custom .xib files to modify native design components.
- Using Grand Central Dispatch to queue asynchronous tasks.