Change for updating symfony standard edition to 2.4
Change for updating symfony standard edition to 2.4

From guide at:
https://github.com/symfony/symfony-standard/blob/2.8/UPGRADE-2.4.md

thecoolestguy/ilios,ilios/ilios,stopfstedt/ilios,dartajax/ilios,stopfstedt/ilios,thecoolestguy/ilios,justinchu17/ilios,dartajax/ilios,justinchu17/ilios,ilios/ilios,justinchu17/ilios,Trott/ilios,justinchu17/ilios,Trott/ilios