Changed enumerations of FontStyle and FontWeight from private readonly List<T> to private ReadOnlyCollection<T>
Updated tests for the planned non-dummy implementation of WordCloudViewModel.GetFontSize().
Added non-dummy implementation of WordCloudViewModel.GetFontSize(). This uses a ReadOnlyCollection<double>, FrequencyFontSizes , of font sizes, with index corresponding to the WordModel's relative, logarithmic frequency. If the frequency is less than zero, the first index of FrequencyFontSizes is returned. If the frequency is greater than the last index (i.e. freq >= FrequencyFontSizes.Count), the last index of FrequencyFontSizes is returned. This ReadOnlyCollection and method therefore determine the minimum and maximum sizes WordModel will be rendered at. This will be changed if I decide that the user should have input over the min/max/average size of rendered WordModels.