Pico doesn't require 'ext-dom' itself, Parsedown Extra does; Parsedown Extra didn't declare this dependency before, but Parsedown Extra 0.8 finally does.
```
* [New] Add `assets_dir`, `assets_url` and `plugins_url` config params
* [New] Add `%config.*%` Markdown placeholders for scalar config params and the
`%assets_url%`, `%themes_url%` and `%plugins_url%` placeholders
* [New] Add `content-sample/theme.md` for theme testing purposes
* [New] Introduce API versioning for themes and support theme-specific configs
using the new `pico-theme.yml` in a theme's directory; `pico-theme.yml`
allows a theme to influence Pico's Twig config, to register known meta
headers and to provide defaults for theme config params
* [New] Add `assets_url`, `themes_url` and `plugins_url` Twig variables
* [New] Add `pages` Twig function to deal with Pico's page tree; this function
replaces the raw usage of Pico's `pages` array in themes
* [New] Add `url` Twig filter to replace URL placeholders (e.g. `%base_url%`)
in strings using the new `Pico::substituteUrl()` method
* [New] Add `onThemeLoading` and `onThemeLoaded` events
* [New] Add `debug` config param and the `Pico::isDebugModeEnabled()` method,
cehcking the `PICO_DEBUG` environment variable, to enable debugging
* [New] Add new `Pico::getNormalizedPath()` method to normalize a path; this
method should be used to prevent content dir breakouts when dealing
with paths provided by user input
* [New] Add new `Pico::getUrlFromPath()` method to guess a URL from a file path
* [New] Add new `Pico::getAbsoluteUrl()` method to make a relative URL absolute
* [New] #505: Create pre-built `.zip` release archives
* [Fixed] #461: Proberly handle content files with a UTF-8 BOM
* [Changed] Introduce API version 3
* [Changed] Rename `theme_url` config param to `themes_url`; the `theme_url`
Twig variable and Markdown placeholder are kept unchanged
* [Changed] Update to Parsedown Extra 0.8 and Parsedown 1.8 (both still beta)
* [Changed] Enable Twig's `autoescape` feature by default; outputting a
variable now causes Twig to escape HTML markup; Pico's `content`
variable is a notable exception, as it is marked as being HTML safe
* [Changed] Rename `prev_page` Twig variable to `previous_page`
* [Changed] Mark `markdown` and `content` Twig filters as being HTML safe
* [Changed] Add `$singleLine` param to `markdown` Twig filter as well as the
`Pico::parseFileContent()` method to parse just a single line of
Markdown input
* [Changed] Add `AbstractPicoPlugin::configEnabled()` method to check whether
a plugin should be enabled or disabled based on Pico's config
* [Changed] Deprecate the use of `AbstractPicoPlugin::__call()`, use
`PicoPluginInterface::getPico()` instead
* [Changed] Update to Twig 1.36 as last version supporting PHP 5.3, use a
Composer-based installation to use a newer Twig version
* [Changed] Add `$basePath` and `$endSlash` params to `Pico::getAbsolutePath()`
* [Changed] Deprecate `Pico::getBaseThemeUrl()`
* [Changed] Replace various `file_exists` calls with proper `is_file` calls
* [Changed] Refactor release & build system
* [Changed] Improve PHP class docs
* [Changed] Various small improvements
* [Removed] Remove superfluous `base_dir` and `theme_dir` Twig variables
* [Removed] Remove `PicoPluginInterface::__construct()`
```
- Separate Travis branch deployment and release deployment stages (also makes `deploy.sh` obsolete)
- Add `clean.sh` and `release.sh` scripts to allow users to create "release" packages locally
- Use `setup/*.sh` scripts to check and install build dependencies (like PHP_CodeSniffer, phpDocumentor and cloc)
- Use `create-release.sh` of `picocms/ci-tools` to create release archives
- Streamline script usage
Use the following to test Pico and to create a "release" package locally:
```sh
cd ~/My-Pico-Workspace/Components/pico
ln -rs ../ci-tools .build/ci-tools
. ./.build/ci-tools/init/local.sh.inc
. ./.build/init.sh.inc
phpcs --standard=.phpcs.xml "$PICO_PROJECT_DIR"
clean.sh
release.sh
```
Otherwise Composer downloads a newer version of Twig which isn't compatible with PHP 5.3. Since we don't pin down specific versions of our dependencies, Composer-based installations might use newer versions of Twig which aren't compatible with PHP 5.3. Raising the PHP requirements requires a new major version, something that will definitly happen with Pico 3.0.
The purpose of `theme.md` is to aid theme development - on this page you'll find basically every format that is possible with Markdown. If you develop a theme, you should make sure that all examples below show decent. The page doesn't show up in the website's menu due to `hidden: true` in the page's YAML header.
This function should be used most of the time when dealing with Pico's pages array, as it allows one to easily traverse Pico's pages tree (see `Pico::getPageTree()`) to retrieve a subset of Pico's pages array in a very convenient and performant way.
- Add pico-theme.yml with a theme's API version, theme-specific default Twig config, registering theme-specific custom meta headers and defaults for Pico's `theme_config` config
- Add new `onThemeLoading(&$theme)` and `onThemeLoaded($theme, $themeApiVersion, &$themeConfig)` events
- Enable Twig autoescaping by default
