Log Message:
Update contao35 to 3.5.13.

Version 3.5.13 (2016-06-15)
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### Fixed
Use the correct empty value when resetting copied fields (see #8365).

### Fixed
Remove the "required" attribute if a subpalette is closed (see #8192).

### Fixed
Correctly generate the feed links in a multi-domain setup (see #8329).

### Fixed
Correctly calculate the maximum file size for DropZone (see #8098).

### Fixed
Do not adjust the start date of a multi-day event (see #8194).

### Fixed
Versionize and show password changes (see #8301).

### Fixed
Make File::$dirname an absolute path again (see #8325).

### Fixed
Store the full URLs in the search index (see contao/core-bundle#491).

### Fixed
Standardize the group names in the checkbox widget (see #8002).

### Fixed
Prevent models from being registered twice (see #8224).

### Fixed
Prevent horizontal scrolling in the ACE editor (see #8328).

### Fixed
Correctly render the breadcrumb links in the template editor (see #8341).

### Fixed
Remove the role attributes from the navigation templates (see #8343).

### Fixed
Do not add `role="tablist"` to the accordion container (see #8344).