Issue #1868178 by marvil07, socketwench, Mile23, wesleydv: (better docs for) Port dbtng_example to D8.
Issue #2218567 by Mile23: Update js_example to demonstrate *.libraries.yml.
Issue #2276929 by Mile23, piestep: Update PHPUnit Example to use *.menu_links.yml, add tests.
Issue #2277357 by piestep, Mile23: Update Cache Example to use *.menu_links.yml, add tests.
Issue #2278749 by Mile23: Rearrange all modules for PSR-4.
Issue #2277367 by martin107, piestep | Mile23: Update Tour Example to use *.menu_links.yml, add tests.