update docs / changelog about python requirement, add myself to AUTHORS

also added 2 FIXMEs to intro.rst about the debugsupport for python 2.4
that needs to get removed
diff --git a/CHANGES b/CHANGES
index 6539c5f..7b204da 100644
--- a/CHANGES
+++ b/CHANGES
@@ -15,6 +15,8 @@
   want to change this encoding they can override the filter.
 - Accessing `last` on the loop context no longer causes the iterator
   to be consumed into a list.
+- Python requirement changed: 2.6, 2.7 or >= 3.3 are required now,
+  supported by same source code, using the "six" compatibility library.
 
 Version 2.6
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