Store locally cached file as jpeg instead of png.
Rename the UILabel controls and use UITextKit.
Initial cleanup of methods and code styling.

Attempting to create methods to handle small, common
tasks that could be reused across the project. Also
started to use constants in more places to make for a
more readable and easily maintainable project.

- Use constants for the Notification Center name.
- Refactor some methods with better naming conventions.
- Move common code tasks into helper methods.