Prepare the resources to be used with Composer
Add an automator job to symlink the public folders to `web/`
Adjust the file manager and file picker to the new logic
Use the PHP short tag `<?=` instead of `<?php echo` now that we have PHP 5.4
Remove the Safe Mode Hack
Remove all XHTML resources
Rename the `BaseTemplate` class to `View`
Remove the IE6 warning
Adjust the logic of the `File` class (see #5341)