private String decodeW1String(byte[] b) {
    try {
      return new String(b, 1, b.length - 1, charset);
    } catch (UnsupportedEncodingException e) {
      throw new RuntimeException(e);
    }
  }
Handles old whalin (tested with v1.6) encoding: data type is in the first
byte of the value.

@author bpartensky
@since Oct 16, 2008
src/main/java/net/spy/memcached/transcoders/WhalinV1Transcoder.java