Log Message:
Update to 0.7.0.0

changelog:
0.7.0.0
    * The performance of encoding to and decoding of bytestrings
      have both improved by up to 2x, while also using less
      memory.
    * New dependency: the scientific package lets us parse
      floating point numbers more quickly and accurately.
    * eitherDecode, decodeStrictWith: fixed bugs.
    * Added FromJSON and ToJSON instances for Tree and Scientific.
    * Fixed the ToJSON instances for UTCTime and ZonedTime.