Log Message:
Update contao35 to 3.5.16.

Version 3.5.16 (2016-09-05)
---------------------------

### Fixed
Check if a reader page is protected when generating a sitemap (see #8416).

### Fixed
Support all characters but =!<> and whitespace in simple tokens (see #8436).

### Fixed
Check the user's permission when generating links in the picker (see #8407).

### Fixed
Handle forward pages without target in the navigation modules (see #8377).

### Fixed
Stop the event recurrence if the upper boundary is reached (see #8445).

### Fixed
Show upcoming events if the first occurrence is in the past (see #8447).

### Updated
Update MooTools to version 1.5.2.

### Fixed
Provide the same template variables for downloads and enclosures (see #8392).

### Fixed
Handle %n when parsing date formats (see #8411).

### Fixed
Fix the module wizard's accessibility (see #8391).

### Fixed
Correctly initialize TinyMCE in sub-palettes in Firefox (see #3673).

### Fixed
Validate form field names more accurately (see #8403).

### Fixed
Correctly show the ctime, mtime and atime of a folder (see #8408).

### Fixed
Correctly index changed pages (see #8439).

### Fixed
Always store the UUID of an uploaded file (see #8421).