CSS Work In Progress

* new peertube theme for ConverseJS
* CSS linting
* splash screen
* defining CSS variables

.stylelintrc.js

@@ -0,0 +1,17 @@
+'use strict';
+
+module.exports = {
+  extends: [
+    'stylelint-config-recommended-scss',
+    'stylelint-config-standard-scss'
+  ],
+  rules: {
+    'selector-class-pattern': [
+      // extending the kebab-case to accept ConverseJS class names.
+      '^([a-z][a-z0-9]*)(-[a-z0-9]+)*(__[a-z]+)?$',
+      {
+        message: 'Expected class selector to be kebab-case, or ConverseJS-style.',
+      }
+    ]
+  }
+}