Merge branch 'docs' into 'dev'

Fix docs, extract CSS to Foris JS.

See merge request turris/reforis/foris-js!10

src/utils/objectHelpers.js

@@ -1,3 +1,10 @@
+/*
+ * Copyright (C) 2019 CZ.NIC z.s.p.o. (http://www.nic.cz/)
+ *
+ * This is free software, licensed under the GNU General Public License v3.
+ * See /LICENSE for more information.
+ */
+
 /** Return undefined if object has no keys, otherwise return object. */
 export function undefinedIfEmpty(instance) {
     if (Object.keys(instance).length > 0) {