#199 Date variable needed

[Marco]

Can you add a variable %DATE% to FooterHtml, HeaderHtml
and Title of the documentors. This can be used include
a date in the help when it was generated.

Example for a title: "My Documentation (date: %DATE(D)%)"

Syntax could be:

%DATE(format)% where DATE is
System.DateTime.Now.ToString(format) and format a
DateTime format specifier as defined in MSDN