Create settings model and cell model

Created a model for the Settings data stored in the plist. Also created an abstract class for the table view cells so cell subclasses can be exposed and manipulated through one class
I'm sure it's the same with regards to performance. I like the width and height functions for conciseness sand readability, though, so I usually use them. i.e. Faster to read and write, not faster to execute. Good to know re: the guide, we can chat about it later.