DefaultValue attribute property rename

[gsscoder]

Since 2.0.x-pre breaks with past stable, at least until 2.0.x reach beta some breaking change could be done to public API.

Add like to do what in subject. Instead of:

[Option(DefaultValue = "中文",
    HelpText = "Content language.")]
  public Language { get; set; }

to:

[Option(Default = "中文",
    HelpText = "Content language.")]
  public Language { get; set; }

Opinions?

cc/ @mizipzor @nemec @gimmemoore

[nemec]

I think they're both equally clear, and this change would distance itself from the MetaValue property which is not at all related to DefaultValue. It would also reduce repetition in ValueAttribute. No more [Value(DefaultValue=[...])]

+1

[gsscoder]

@nemec, thanks for clear comment... I thought only to shortening property name, but you added valuable points!

[gsscoder]

Done.

[XenHat]

I've been putting off updating CommandLine for our project because I was unaware of this rename and I thought the option had been removed:

I also couldn't find any indication of that option still existing in the documentation until I started searching through the closed issues.
Perhaps documentation on how to specify default values should be re-added for LatestVersion?