Add dashboard widget to show the latest notes. Issue #51

p.s: I would like to be able to select a particular tag to show, but
none of the dashboard widgets are configurable.

I hate increasing the app size from 300k to almost 3 mb for something
so simple, but we must adapt to the majority and use vue here.

src/dashboard.js

@@ -0,0 +1,11 @@
+import Vue from 'vue'
+import Dashboard from './components/Dashboard.vue'
+
+Vue.mixin({ methods: { t, n } })
+
+document.addEventListener('DOMContentLoaded', () => {
+	OCA.Dashboard.register('quicknotes', (el) => {
+		const View = Vue.extend(Dashboard)
+		new View().$mount(el)
+	})
+})