Add vue-identicon (#178)

* Add vue-identicon

* Remove generated file

* Add links to reactnative & vue identicons

* Update package.json

* Update Jdenticon.vue

* Update Polkadot.vue

* Move deps around

* Empty on error

* Build to build

* ... typo

* Fix vue-identicon doc generation

* Ok, I give up... vuepress and vue packages, no luck

* Swap to TypeScript components (aligning with polkadot-js)

* Expand template with build

* Adjust vue examples

* debump gh-pages dep

* Expand doc. desc.

* Fix vuepress docs generation

* Address CC complexity

* eslint fix (babel config)

* Add Bechball

packages/vue-identicon/src/icons/Empty.ts

@@ -0,0 +1,18 @@
+// Copyright 2017-2019 @polkadot/vue-identicon authors & contributors
+// This software may be modified and distributed under the terms
+// of the Apache-2.0 license. See the LICENSE file for details.
+
+import Vue from 'vue';
+
+/**
+ * @name Empty
+ * @description An empty identicon
+ */
+export const Empty = Vue.extend({
+  template: `
+    <svg :height="size" :width="size" viewBox="0 0 64 64">
+      <circle cx="50%" cy="50%" fill="#eee" r="50%" />
+    </svg>
+  `,
+  props: ['size']
+});