Make ConsoleTextColor ctor public

[vanbukin]

As I see, it just specifies an html color. I think it will be cool to allow specify any color if ctor become public.

[wischi-chr]

Here is a workaround that uses reflection to invoke the private constructor and create custom colors.

public static ConsoleTextColor GetColorViaReflection(string color)
{
    var ctor = typeof(ConsoleTextColor).GetConstructor(BindingFlags.NonPublic | BindingFlags.Instance, null, new[] { typeof(string) }, null);
    return (ConsoleTextColor)ctor.Invoke(new[] { color });
}