fgm/php__symfony__book: FGM's version of the code suggested in the SF4 book. @ b7e8aabb9f375c85d943dbc9630f9ee52c123698

Frederic G. MARAND d230f127f7 Ch. 4: Using session data.		%!s(int64=7) %!d(string=hai) anos
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dev	deeb7894a7 Ch. 2: profiler, twig.	%!s(int64=7) %!d(string=hai) anos
test	deeb7894a7 Ch. 2: profiler, twig.	%!s(int64=7) %!d(string=hai) anos
framework.yaml	d230f127f7 Ch. 4: Using session data.	%!s(int64=7) %!d(string=hai) anos
routing.yaml	f8830b8a47 Initial commit: generated skeleton + composer require server.	%!s(int64=7) %!d(string=hai) anos
twig.yaml	deeb7894a7 Ch. 2: profiler, twig.	%!s(int64=7) %!d(string=hai) anos