Abstract Kernel implements SuluKernel
updated dependencies
added reverse-proxy ttl handling
fixed overview template
changed navigation interface
Merge branch 'develop' of github.com:sulu-cmf/sulu-standard into feature/performance

Conflicts:
	composer.lock
Merge branch 'feature/reverse-proxy-ttl' into develop
Merge branch 'develop' of github.com:sulu-cmf/sulu-standard into feature/performance
removed disable request analyzer
updated dependencies
fixed twig function names
corrected webspace config
Merge pull request #261 from sulu-cmf/feature/sulu-kernel

[ENHANCEMENT] Abstract Kernel implements SuluKernel
updated dependencies
Updated name of navigation function in client template
Merge pull request #284 from sulu-cmf/hotfix/navigation_fix

Updated name of navigation function in client template
Merge branch 'develop' of github.com:sulu-cmf/sulu-standard into develop
updated dependencies
enalbe request analyzer for admin
Merge branch 'develop' of github.com:sulu-cmf/sulu-standard into feature/performance

Conflicts:
	src/Client/Bundle/WebsiteBundle/Resources/themes/default/views/navigation.html.twig