[libpng16] Bump version to 1.6.10beta04

CHANGES

diff --git a/CHANGES b/CHANGES
index 8f43714..88bea6d 100644
--- a/CHANGES
+++ b/CHANGES
@@ -4860,6 +4860,8 @@
   Moved some documentation from png.h to libpng.3 and libpng-manual.txt
   Minor editing of contrib/arm-neon/README and contrib/examples/*.c
 
+Version 1.6.10beta04 [February 25, 2014]
+
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