PSR-4 compatibility renaming
Move existing stuff (page_layout and page_layout_ui stuff) to submodule page_layout
Add rudimentary funcationality for Layout plugin
Add layout_example and block_page modules
Add LayoutRegion (Annotation, Interface, Base class, PluginBag), add an example to layout_example module and adjust block_page
Cleanup page_layout to use layout.module's plugins
Fix issues with (intra-region) sorting, additional cleanup of JS
Remove references to LayoutTemplate, unbreak rudimentary page_layout render() call, fix hook_theme and allow for selection of LayoutRegion plugin type when adding subregions
Minor tweak to css to make difference between blocks and (sub-regions) a little clearer
Add missing route layout.page_variant_layout_regions_select
Remove references to 'layout templates'
Revert the incomplete sortable regions patch
Make regions ordered by region-weight (not drag and drop UI)
#2: dsnopek - fix modal links
Fixes #4 - layout region positioning in a container/details wrapper
Fixes #3 - repaint full app view on region change
Fixes #5 - add subfolders for Layout and LayoutRegion plugins
ContextHandler moved to core (#2277981)
Fix block selection (ContextHandler now in core), and make changes to adjust to stop caching plugin discovery/info hooks by language (#2281905)
Added minimalistic layout types.