Merge branch 'release'

* release:
  Fixes Giveth/giveth-dapp#239
  for some reason winston captures FeathersError objects, don't mutate them
  remove dir warning for file logger
  Update winston and optionally save json logs
  quite down NotFound logger
  Milestones can now be deleted again.
  fixes Giveth#453 correctly set isReturn for delegated pledges
  set homeTxHash for initialDonations not processed via ui
  fix bug where faildTxMonitor was creating new events instead of patching the existing event
  fix bug where milestone update was blocked for disbursing milestone payment
  fix bug with milestone state updates
  remove console.log statement
  fix typo to prevent milestone state regression

# Conflicts:
#	src/blockchain/watcher.js

config/default.json

@@ -11,6 +11,7 @@
   "nedb": "../data",
   "uploads": "../uploads",
   "uploadsBaseUrl": "http://localhost:3030/uploads/",
+  "logDir": "",
   "blockchain": {
     "nodeUrl": "ws://localhost:8546",
     "homeNodeUrl": "ws://localhost:8545",