added webpack-encore for managing frontend assets #113 (#122)

* updated installation docu #113
* rewritten login page #113
* added icheck plugin #113
* changed to YesNoType in edit forms #113
* updated CONTRIBUTING.md #113
* added start of developer docu #113
* added compile scripts and compiled assets #113

assets/js/toolbar.js

@@ -0,0 +1,39 @@
+/*!
+ * Kimai Time-Tracking - toolbar.js
+ *
+ * This file is part of the Kimai package.
+ *
+ * (c) Kevin Papst <kevin@kevinpapst.de>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+$(document).ready(function () {
+
+    // DateRange - TODO improve me, so users can type without reloading in between
+    $('.toolbar form input').change(function (event) {
+        $('.toolbar form').submit();
+    });
+
+    $('.toolbar form select').change(function (event) {
+        switch (event.target.id) {
+            case 'customer':
+                if ($(this).val() === '') {
+                    $('.toolbar form select#project').parent().remove();
+                } else {
+                    $('.toolbar form select#project').val('');
+                }
+                $('.toolbar form select#activity').parent().remove();
+                break;
+            case 'project':
+                if ($(this).val() === '') {
+                    $('.toolbar form select#activity').parent().remove();
+                } else {
+                    $('.toolbar form select#activity').val('');
+                }
+                break;
+        }
+        $('.toolbar form').submit();
+    });
+
+});