fixed/extended changes.txt

Author: gitsbi

changes.txt

@@ -1,9 +1,12 @@
 Changes
 =======
 
+0.7.7
+* allow changing (at compile-time) of literal operator return types configurable
+* extended Readme.md
+
 0.7.6
 * major redesign of floating point comparison
-* literal operator return types are now configurable (default is double and long)
 
 0.7.5.3
 * added an untag function to simplify tag_cast'ing to an untagged type