```
* [Changed] Improve documentation
* [Changed] Add missing "Formatted Date", "Time" and "Hidden" meta headers; use
the "Hidden" meta header to manually hide a page in the pages list
```
Use the `Formatted Date` meta header to explicitly set a page's formatted date (i.e. `$meta['date_formatted']`), and `Time` to set `$meta['time']`. Use the `Hidden` meta header to manually hide a page (the page is still accessible, but won't show up in the pages list). Note the difference between `$pageData['hidden']` and `$pageData['meta']['hidden']`.
```
* [Changed] Add `README.md`, `CONTRIBUTING.md` and `CHANGELOG.md` of main repo
to pre-bundled releases, keep `.gitignore`
* [Changed] Deny access to a possibly existing `composer.phar` in `.htaccess`
* [Changed] Disallow the use of the `callback` filter for the `url_param` and
`form_param` Twig functions
* [Changed] Improve documentation
* [Fixed] Fix page tree when sorting pages by arbitrary values
* [Fixed] Fix sorting of `Pico::$nativePlugins`
```
nginx's rewrite rules don't have to match `picocms/Pico`'s `.htaccess`, but `picocms/pico-composer`'s `.htaccess` - because basically all installations of Pico 2.0 and later use `picocms/pico-composer`'s frame.
It doesn't make much sense to remove all .gitignore files just to explain users that they should create those files if they want to manage their website using a Git repository.
```
* [New] Improve release & build process and move most build tools to the new
`picocms/ci-tools` repo, allowing them to be used by other projects
* [New] Add page tree; refer to the `Pico::buildPageTree()` method for more
details; also see the `onPageTreeBuilt` event
* [Changed] Update dependencies: Twig 1.35
* [Changed] ! Improve `.htaccess` and deny access to all dot files by default
* [Changed] ! Throw a `RuntimeException` when non-native plugins are loaded,
but Pico's `PicoDeprecated` plugin is not loaded
* [Changed] ! Change `AbstractPicoPlugin::$enabled`'s behavior: setting it to
TRUE now leads to throwing a `RuntimeException` when the plugin's
dependencies aren't fulfilled; use NULL to maintain old behavior
* [Changed] ! Force themes to use `.twig` as file extension for Twig templates
* [Changed] Improve PHP class docs
* [Changed] Various small improvements
```
