Fix issue 2245.  aifc now skips any chunk type it doesn't actually
process instead of throwing errors for anything not in an explicit
skip list.  This is per this spec: http://www.cnpbagwell.com/aiff-c.txt.
Spec reference and test sound file provided by Santiago Peresón, fix
based on patch by Hiroaki Kawai.
diff --git a/Misc/ACKS b/Misc/ACKS
index 4b409e1..d650b67 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -370,6 +370,7 @@
 Peter van Kampen
 Jacob Kaplan-Moss
 Lou Kates
+Hiroaki Kawai
 Sebastien Keim
 Robert Kern
 Randall Kern
@@ -541,6 +542,7 @@
 Samuele Pedroni
 Marcel van der Peijl
 Steven Pemberton
+Santiago Peresón
 Mark Perrego
 Trevor Perrin
 Tim Peters