Issue #2318669 by slashrsm: Add README.md and DEVELOPING.md.
Merge pull request #14 from slashrsm/2318669

Add README.md and DEVELOPING.md
Issue #2341921 by slashrsm: Chase HEAD - permissions to yml and plugin interface in plugin managers.
Merge pull request #15 from slashrsm/2341921

Chase HEAD
Issue #2344257 by slashrsm: Dynamically generate routes.
Merge pull request #16 from slashrsm/gen_routes

Issue #2344257 by slashrsm: Dynamically generate routes.
by slashrsm: Make StandalonePage::page return form that entity browser builds + dynamically generate permissions to access generated routes.
by slashrsm: Fix typo.
by slashrsm: Fix comments.
by slashrsm: Fix comments.
by slashrsm: Add permissions callback class.
by slashrsm: Fix tests.
by slashrsm: Add test for dynamically generated permissions.
Merge pull request #17 from slashrsm/gen_routes

 Make StandalonePage::page return form that entity browser builds + dynamically generate permissions to access generated routes.
Issue #2349609 by slashrsm: Create single widget selector.
Merge pull request #18 from slashrsm/single_widget

Issue #2349609 by slashrsm: Create single widget selector.
by slashrsm: Simplify display classes.
by slashrsm: Simplify selection display classes naming.
by slashrsm: Simplify widget classes naming.
by slashrsm: Fix tests.