* add option to use a single size for all fonts. Good for pixel fonts.
* remove option to use tapped colours due to being unreliable (tapped colours are now always used when necessary)
* update kui
* new function, KuiNameplates.RegisterSize
* remove redundant `addon.font`s
* move ModifyFontFlags function to kui
* make castbar register message listeners correctly
* make castbar create itself when enabled
* make monochrome, outline options reapply upon loading
* make onesize setting work without reloading
* make CreateFontString use the global setting for outline, monochrome
* use frame.CreateFontString instead of addon.CreateFontString
* all `outline = true`s in CreateFontString are now redundant