Added unit test to insure we can roundtrip JSON
Added unit test to insure we can roundtrip JSON

kevsmith/erlang_js-jaegermonkey,sameroom/erlang_js,systra/erlang_js,basho/erlang_js,sameroom/erlang_js,cristianberneanu/erlang_js,zero778/erlang_js,basho/erlang_js,systra/erlang_js,zero778/erlang_js,zero778/erlang_js,kevsmith/erlang_js-jaegermonkey,sameroom/erlang_js,kevsmith/erlang_js-jaegermonkey,cristianberneanu/erlang_js,basho/erlang_js