Merge branch 'chore/mongo' into develop

* chore/mongo:
  Fixes Giveth#316, fixes Giveth#252.
  Fixes Giveth#314
  fix throwing delete in script, added catch
  Fixed milestones that were causing issues because some values were undefined. Started altering milestones that should be altered during migration. Fixes Giveth#336, Giveth#348
  Fixed the EthConversionRateTimestamp
  Update migration script, update milestone model - make image not required and remove item id
  Migration script for milestones and users
  Fix conversations, clean up
  A lot of changes to models, fixing queries and issues. Update readme
  Migrated milestones to mongoose
  Setup mongoose, translate user and campaign model to mongoose

# Conflicts:
#	package-lock.json

.babelrc

@@ -1,3 +1,11 @@
 {
-	"presets": ["env"]
-}
+  "presets": [
+    ["env", {
+      "targets": {
+        "node": "current"
+      }
+      }],
+    "stage-1"
+  ],
+  "plugins": []
+}

README.md

@@ -42,6 +42,8 @@ Welcome to the server code for Giveth's [dapp](https://github.com/Giveth/giveth-
     npm install
     ```
     * note: due to a bug in yarn, `yarn install` currently does not work
+7. Install Mongo (we recommend installing via [Brew](https://treehouse.github.io/installation-guides/mac/mongo-mac.html))
+8. Run Mongo in a terminal window `mongod` or in the background `mongod --fork --syslog`
 
 ### Run server
 The feathers server will need to connect to an ethereum node via websockets. Typically this will be a local TestRPC instance. 

config/default.json

@@ -7,6 +7,7 @@
     "default": 25,
     "max": 100
   },
+  "mongodb": "mongodb://localhost:27017/giveth",  
   "nedb": "../data",
   "uploads": "../uploads",
   "uploadsBaseUrl": "http://localhost:3030/uploads/",