Frontend: inject AppKernel via constructor.

Making the kernel + DI container available in the entire frontend application.
API: validate if version exists.
FrontendUrl: add kernel dependency injection.
Frontend: refactor 'url' to DI container.
Frontend: refactor 'template' to DI container.
Frontend: refactor 'breadcrumb' to DI container.
Frontend: refactor 'header' to DI container.
Frontend: refactor 'footer' to DI container.
Frontend: refactor 'page' to DI container.
Frontend: refactor 'campaignmonitor' to DI container.
Frontend: refactor 'facebook' to DI container.
Frontend: refactor 'parseWidget' to DI container.
Frontend: return campaignmonitor from DI container.
Added a cookiebar

This bar will inform the user that Fork uses cookies to track visitors.
Added javascript handling for the cookieBar
Added methods to check if cookies are allowed or the visitor has hidden the cookiebar
Hide the cookiebar from within the code to prevent flickering
Only set track-cookie if it is allowed

This means each first visit will be ignored.
Also if a visitor chooses to not allow cookies his visitor-id will be unique each time.
Anonymize IP when cookies aren't allowed
Resolve conflicts.