Create allcontributors config file

.all-contributorsrc

@@ -0,0 +1,17 @@
+{
+  "files": ["README.md"],
+  "imageSize": 100,
+  "contributorsPerLine": 7,
+  "contributorsSortAlphabetically": false,
+  "badgeTemplate": "[![All Contributors](https://img.shields.io/badge/all_contributors-<%= contributors.length %>-orange.svg?style=flat-square)](#contributors)",
+  "contributorTemplate": "<a href=\"<%= contributor.profile %>\"><img src=\"<%= contributor.avatar_url %>\" width=\"<%= options.imageSize %>px;\" alt=\"\"/><br /><sub><b><%= contributor.name %></b></sub></a>",
+  "types": {
+    "custom": {
+      "symbol": "🔭",
+      "description": "A custom contribution type.",
+      "link": "[<%= symbol %>](<%= url %> \"<%= description %>\"),"
+    }
+  },
+  "skipCi": "true",
+  "contributors": []
+}