Abstract out common "style" logic

[kezz]

There are three objects which can be styles; Style, Component and ComponentBuilder. Each of these three classes contain different methods for setting elements of the style and duplicated implementation details.

If style logic could be abstracted into a Styleable(?) interface, the API could be unified and the implementation of some methods could be shared. Additionally, this would allow for better abstraction, aiding developers who are manipulating the style of objects.