Log Message:
0.4.2
Bugs fixed
 * Unpacker doesn't increment refcount of ExtType hook.
 * Packer raises no exception for inputs doesn't fit to msgpack format.

0.4.1
Changes

 * fallback.Unpacker.feed() supports bytearray.

Bugs fixed

 * Unpacker doesn't increment refcount of hooks. Hooks may be GCed while
   unpacking.
 * Unpacker may read unfilled internal buffer.