Add BorderRightColorKeyword
Modify example
Modify BorderRightColor
Modify BorderRightColor.getNormalizedValue
Modify BorderRightColor.pattern
Modify BorderBottomColor.getNormalizedValue
Modify BorderLeftColor.getNormalizedValue
Add BorderTopColorKeyword
Modify example
Modify BorderTopColor
Modify BorderTopColor.getNormalizedValue
Modify BorderTopColor.pattern
Modify example
Modify BorderTopColor.pattern