Only SensioFrameworkExtraBundle is included in SE
A few new questions
Add some questions
Merge pull request #29 from prevueltas/php-questions

Add a few questions to PHP section
Merge pull request #28 from pkraeutli/patch-1

Only SensioFrameworkExtraBundle is included in SE
- fixed some questions and typos
- split up some into proper categories
- split up cordoval's battery into proper categories as Cordovals Battery is not a category in Symfony and makes contributing confusing