minor wording changes..

README.md

@@ -50,8 +50,8 @@ Defintion of module names in cas package:
 v<num>_<type>_<arg>
 
 Currently v1 is defined, and has the following types:
-	f	The arg is the hash of the Python source file.
-		Example generated via: shasum -a 256 hello.py
+	f	The arg is the hexidecimal hash of the Python source file.
+		Generated via: shasum -a 256 hello.py
 	a	An alias.  Any aliases must be loaded before being
 		processed.  This is a short name that could be used.