title: Handle large JSON with Scala
body: <p><br/>
  I have several files with an array inside and I need to concatenate these arrays. The problem is those files are a lot and quite big (around 5mb each, in total more than 100mb).<br/>
  I tried with PlayJson but I got back a StackOverflow error and I think this is caused by the parsing of the String into the Json Object, so I am looking for another Scala library. Do you have any suggestion? <br/>
  I don't care too much for this case to marshal the json to an object, I simply need a way to do some simple changes in the JSON structure.</p>