Added a note about the side effects of enabling both PHP and Twig#4220

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weaverryan merged 3 commits intosymfony:2.3from

javiereguiluz:php_templating_note

Sep 16, 2014

Commits on Sep 12, 2014

Added a note about the side effects of enabling both PHP and Twig
javiereguiluz
committed

Commits on Sep 13, 2014

Improved the explanation thanks to @stof comments
javiereguiluz
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Reworded the explanation about the limitation of enablin PHP templates
javiereguiluz
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