Squashed commit of the following:

commit 3bf7b58cfc5441c18bb4c5b7a08302d618fa7fd3
Author: Ashwin Chandra Putta <ashwin@datatorrent.com>
Date:   Wed Sep 25 18:23:49 2013 -0700

    added test for JsonByteArrayToHashMap operator

commit 4631eda09ac7940072a6cdff8bf083d1c963c27e
Author: Ashwin Chandra Putta <ashwin@datatorrent.com>
Date:   Wed Sep 25 13:52:37 2013 -0700

    added apache license header to new operator

commit beeb211f8946b19b849c3023b04b319584daff0b
Author: Ashwin Chandra Putta <ashwin@datatorrent.com>
Date:   Wed Sep 25 13:50:11 2013 -0700

    created pass through operator to convert json byte stream to hashmap
Merge pull request #89 from ashwinchandrap/logstream_upstream

Added operator to convert json byte stream to java hash map