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

Frederic G. MARAND deeb7894a7 Ch. 2: profiler, twig.		6 vuotta sitten
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twig.yaml	deeb7894a7 Ch. 2: profiler, twig.	6 vuotta sitten
web_profiler.yaml	deeb7894a7 Ch. 2: profiler, twig.	6 vuotta sitten