Also remove the SimplePie compatibility test when creating the build
Use the new `phpdoc` command in the build script
Use `pack()` instead of `hex2bin()` to be compatible with PHP 5.3 (see #7010)
Add an `.htaccess` file to the `vendor` folder
Update the build script to preserve the root folder upon packing
Use a more precise UUID detection in the `FilesModel` class (see #7054)
Correctly generate the CSS classes of the `FormSelectMenu` widget (see #7045)
Restore the "submit_container" class in the `FormSubmit` widget (see #7055)
Make the viewport field 255 characters long (see #7050)
Only use the DropZone uploader where Ajax uploads can be processed (see #7046)
Correctly set the default page title (see #6783)
Preload TinyMCE so it can be used in subpalettes (see #7056)
Remove the example website from the core distribution

The example website is now available in the extension repository.
Support adding ACE and TinyMCE in subpalettes (see #7056)
Do not make the `FormRadioButton` options an array (see #7060)
Grant access to static files inside the `vendor` folder
Update the language files
Bump the version number
Merge branch 'hotfix/3.3.1'