The `{% component %} tag now supports passing parameters that override the component properties when they are rendered.
Calling `addJs()` and `addCss()` in components without a starting slash (/) will now reference the component directory, instead of the theme.
This commit adds a second parameter $attributes to the following functions:
- AssetMaker::addJs
- AssetMaker::addCss
- AssetMaker::addRss
This is useful when dealing with javascript libraries like require.js, which depend on these HTML attributes to function properly.
It does not break the existing code!