Enhancement: Add a "smart date" formatter

[Nathan Toone]

GMail (and others) do a really nice thing with their date and time formatting to keep it short:

If the date portion is the current day, only the time portion is displayed (i.e. "9:32 am").

If the date portion is within the past week, it displays the day of week and the time (i.e. "Mon 9:32 am")

If the year portion is the same as the current year, it displays the month and day only (i.e. "Nov 1")

Otherwise, it displays the date in "medium" format length (i.e. "Jun 1, 2010")

It might be nice to have a formatting function in dojox that would do the same sort of thing...

[Nathan Toone]

Implemented in revision [17706]

[Nathan Toone]

Documented at ​http://docs.dojocampus.org/dojox/date/relative