Profiler extension for sulu

- Show contextual information about current request
Added unit test
Merge branch 'feature/debug-toolbar' into develop
Do not reference \AbstractKernel
Merge branch 'bugfix/fix-abstract-kernel' into develop
Merge branch 'hotfix/exception-variables' into develop
corrected composer json
Merge branch 'develop' of git://github.com/sulu-cmf/SuluWebsiteBundle into hotfix/navigation-performance

Conflicts:
	composer.json