Read response pathfinder2

[llunaCreixent]

Instead of responding a json, the pathfinder2 instance responds with a TransferThrough object that is readable. This object is parsed in the pathfinder-proxy to json. Since the pathfinder2 doesn't support the iterative option, there is no problem with parsing the response. However if we want to use the iterative option we need to process the readable object. The new method processResponseNdjson reads the response of the pathfinder2 and returns only one json.

Closes #182

Missing tasks:

• clean console.log
• Check if we need more tests
• Review error handling
• assess the need for pathfinder method called cancel(id)