Renames Pins and adds Receipts (#69)

Author: simon-wg

frontend/data/service.json

@@ -111,11 +111,18 @@
                 "icon": "water"
             },
             {
-                "title": "pinIT",
+                "title": "Pins",
                 "url": "https://pins.chalmers.it",
                 "description": "Create templates for printing pins",
                 "github_url": "https://github.com/cthit/pins",
-                "icon": "bulb"
+                "icon": "pins"
+            },
+            {
+                "title": "Receipts",
+                "url": "https://kvitto.chalmers.it",
+                "description": "Create receipts if the originals have been lost",
+                "github_url": "https://github.com/cthit/kvitto",
+                "icon": "receipt"
             },
             {
                 "title": "Vikunja",