Screen, ScreenView, and model class names don't follow PhET naming conventions

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Noted while converting ScreenView subclasses to class for phetsims/tasks#1044.

Screen, ScreenView, and model classes do not follow PhET naming conventions. Their prefix should be the screen name. And for Screens and ScreenViews, their suffix should be "Screen" and "ScreenView" respectively.

Here are the name changes that follow PhET conventions:

CoulombsLawAtomicScreen -> AtomicScaleScreen
CoulombsLawAtomicView -> AtomicScaleScreenView
CoulombsLawAtomicModel -> AtomicScaleModel

CoulombsLawMacroScreen -> MacroScaleScreen
CoulombsLawMacroView -> MacroScaleScreenView
CoulombsLawMacroModel -> MacroScaleModel

CoulombsLawCommonView -> CoulombsLawCommonScreenView, or (more typically) CoulombsLawScreenView
CoulombsLawCommonModel -> more typically CoulombsLawModel

This bogus type expressions also appears throughout the code:

@param {CoulombsLawModel} coulombsLawModel