Updated CSS classing of sortable inline and stacked items.

Concatenated classing of sortable inlines into one stylesheet.
Updated version to 1.3.3
Updated README

README

@@ -130,10 +130,10 @@ Status
 admin-sortable is currently used in production.
 
 
-What's new in 1.3.2
+What's new in 1.3.3
 =============
-- Fixed an issue that prevented sorting on classes that specified a SortableForeignKey
-class, where the SortableForeignKey model itself did not inherit from Sortable.
+- Fixed an issue where sortable inlines weren't getting the correct CSS class
+which gave them the appearance of not being sortable.
 
 Features
 =============