Vue Store (#8071)

* vue: use our own store in place of vuex

* vue store: add getters, watcher and use internal vue instance

* vue store: better state getter and credits to Vuex

* vue store: $watch -> watch

* vuex store: pass store to getters and fix typos

* add comments to store, start writing tests

* fix unit tests and add missing ones

* cleanup components, add less folder, fetch tassks

* use Vuex helpers

* pin vuex version

* move semantic-ui theme to assets/less, keep website/build empty but in git

* import helpers from vuex

website/client/components/home.vue

@@ -1,13 +1,24 @@
 <template lang="pug">
-p {{ msg }}
+div
+  p {{ msg }}
+  p Welcome back {{profileName}}!
+  p You have {{tasksCount}} tasks!
 </template>
 
 <script>
+import { mapState, mapGetters } from '../store';
+
 export default {
   data () {
     return {
       msg: 'You\'re on the Home page!',
     };
   },
+  computed: {
+    ...mapState({
+      tasksCount: (state) => state.tasks.length,
+    }),
+    ...mapGetters(['profileName']),
+  },
 };
 </script>