Inconsistent signatures for API objects

[m-vdb]

Node, Trans and User classes do not have the same signatures:

• SynapsePy/synapsepy/node.py

  Lines 2 to 4 in c28cded

  	class Node():
  	def __init__(self, response, full_dehydrate=False):

• SynapsePy/synapsepy/user.py

  Lines 16 to 19 in c28cded

  	class User():
  	""" User Record
  	"""
  	def __init__(self, response, http, full_dehydrate=False, logging=False):

• SynapsePy/synapsepy/transaction.py

  Lines 2 to 6 in c28cded

  	class Trans():
  	def __init__(self, response):
  	self.id = response['_id']
  	self.body = response

It's inconsistent and prevents usage of such structures for webhooks (we're currently implementing webhooks and we want to use these structures, but it doesn't work as expected).