minor #467 Drop support for PHP 5.3 callbacks (javiereguiluz)
minor #467 Drop support for PHP 5.3 callbacks (javiereguiluz)

This PR was merged into the master branch.

Discussion
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Drop support for PHP 5.3 callbacks

We now require PHP 5.5.9 in this app, so there's no need to maintain this code.

Commits
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572b2bf Drop support for PHP 5.3 callbacks

yceruto/symfony-demo,javiereguiluz/symfony-demo,Codeception/symfony-demo,nilamkhedkar1/symfony_demo,bocharsky-bw/symfony-demo,maidmaid/symfony-demo,voronkovich/symfony-demo,dzuelke/symfony-demo,javiereguiluz/symfony-demo,voronkovich/symfony-demo,symfony/symfony-demo,bocharsky-bw/symfony-demo,nilamkhedkar1/symfony_demo,yodur2potassium/test-behat-selenium-symfo,samitiana/symfony-demo,javiereguiluz/symfony-demo,maidmaid/symfony-demo,TomasVotruba/symfony-demo,Codeception/symfony-demo,dzuelke/symfony-demo,yceruto/symfony-demo,yceruto/symfony-demo,Codeception/symfony-demo,samitiana/symfony-demo,yodur2potassium/test-behat-selenium-symfo,yodur2potassium/test-behat-selenium-symfo,symfony/symfony-demo,TomasVotruba/symfony-demo,TomasVotruba/symfony-demo,samitiana/symfony-demo,dzuelke/symfony-demo,maidmaid/symfony-demo,bocharsky-bw/symfony-demo,symfony/symfony-demo,nilamkhedkar1/symfony_demo,voronkovich/symfony-demo