Updated description of 1.5 release

Author: rmm5t

README.markdown

@@ -74,7 +74,7 @@ As time passes, the timestamps will automatically update.
 
 | Version | Notes                                                                           |
 |---------|---------------------------------------------------------------------------------|
-|   1.5.x | ([compare][compare-1.5]) Added allowPast setting                                |
+|   1.5.x | ([compare][compare-1.5]) Added Date object as argument to update function       |
 |   1.4.x | ([compare][compare-1.4]) Added allowPast setting                                |
 |   1.3.x | ([compare][compare-1.3]) Added updateFromDOM function; bug fixes; bower support |
 |   1.2.x | ([compare][compare-1.2]) Added cutoff setting                                   |