Add Exchanger by @vkaltyrin (#525)

[ci skip]

contents.json

@@ -14696,6 +14696,27 @@
       "date_added": "Dec 10 2017",
       "license": "other",
       "suggested_by": "@dkhamsing"
+    },
+    {
+      "title": "Exchanger",
+      "category-ids": [
+        "finance",
+        "viper"
+      ],
+      "tags": [
+        "viper",
+        "objc",
+        "core-data"
+      ],
+      "description": "Exchange currencies from multiply wallets on ECB exchange rates",
+      "source": "https://github.com/vkaltyrin/exchanger",
+      "license": "mit",
+      "screenshots": [
+        "https://github.com/vkaltyrin/exchanger/blob/master/screenshot.png"
+      ],
+      "date_added": "Dec 21 2017",
+      "suggested_by": "@vkaltyrin",
+      "stars": 0
     }
   ]
 }