fgm/php__symfony__book: FGM's version of the code suggested in the SF4 book. @ getting-started

Frederic G. MARAND deeb7894a7 Ch. 2: profiler, twig.		7 lat temu
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routing.yaml	f8830b8a47 Initial commit: generated skeleton + composer require server.	7 lat temu
security_checker.yaml	954eaf1efd Ch. 1: Support annotated routes with composer require annotations.	7 lat temu
web_profiler.yaml	deeb7894a7 Ch. 2: profiler, twig.	7 lat temu