read me version changes

Author: adamwdraper

README.md

@@ -42,6 +42,12 @@ See [the english unit tests](https://github.com/adamwdraper/Numeral-js/blob/mast
 
 # Changelog
 
+### 1.5.3
+
+Added float precision math support
+
+Added specification of abbreviation in thousands, millions, billions
+
 ### 1.5.2
 
 Bug fix: Unformat should pass through if given a number