highlight current day in date-picker (#527)

assets/sass/app.scss

@@ -38,3 +38,4 @@ footer.main-footer {
 @import 'dashboard';
 @import 'navbar';
 @import 'documentation';
+@import 'daterangepicker';

assets/sass/daterangepicker.scss

@@ -0,0 +1,9 @@
+
+.drp-calendar {
+    .calendar-table {
+        td.today:not(.active) {
+            background-color: lighten(#357ebd, 40);
+            color: #357ebd;
+        }
+    }
+}