Update change log.

Author: yfakariya

CHANGES.txt

@@ -641,7 +641,17 @@ Release 0.9.0 beta2 2017/2/12
   * Fix types which implement IPackable and IUnpackable but do not have any members cannot be serialized. Issue #202
   * Fix Windows Native build error. Issue #206.
 
-Release 0.9.0 RC1 T.B.D.
+Release 0.9.0 RC1 T.B.D
+
+  NEW FEATURES
+  * ByteArrayPacker/ByteArrayUnpacker. They are suitable for fixed pattern serialization/deserialization.
+  * Fast mode of unpacker which omits nested collection management. This option can be disabled with setting UnpackerOptions.ValidationLevel to ValidationLevel.Collection.
+
+  IMPROVEMENTS
+  * Byte array based serialization API now uses ByteArrayPacker/ByteArrayUnpacker, improves about 40% faster than Stream based.
+  * Deserialization now uses ValidationLevel.None, improves about 30% faster than validating one.
+  * Packer/Unpacker performance improvements about 10-20%. As a result, new byte array "fast" unpacker is about 3x faster than previous unpacker.
 
   BUG FIXES
   * Fix constructor deserialization fails if the constructor parameters order is not lexical. Issue #233
+  * Fix asynchronous multi dimensional array deserialization corruption.