Components extension: Sidebar and layout templates
I extended the functionality of the components, to allow components to return content for the sidebar. Further, this MR implements four different layouts:
- default: A default layout, that can handle sidebar content
- storyboard: The storyboard layout - without a sidebar
- focal_left: Like this, with or without sidebar
- 2x2_grid: Like this, with or without sidebar
Minor changes:
- Component functions from other packages are not prefixed by
render_
anymore!