Add checks for the frontend of the website

[mgrundkoetter]

Add a crawler like guzzle to really check the frontend of the website for several things:

• SSL secured connection if forms are used
• are permanent cookies used for tracking services like GA, etracker, piwik a.s.o.

This could be done as a service which can then be called in the backend module, from the cli or elsewhere.

[janmaennig]

I would like to take on this task.

[mgrundkoetter]

Sure, go ahead. Fork it, create a branch and then create a pull request 😃