Update list for del.icio.us buttons
del.icio.us buttons 1.4 estimated in February 1, 2010
-alpha release
del.icio.us buttons 1.3 forthcoming in December 8, 2009
-1.3 beta release
del.icio.us buttons 1.2.1 from October 24, 2008
This a minor update- the only change is that the xpi is now signed for security.
