Access to the cookiejar

[em-cliqz]

It would be nice to have access to the cookiejar on the agent object. That is, the "jar" object is visible, but the functions are not usable without the cookiejar library. As a rough workaround now I import the "cookiejar.js" file directly in order to access the "CookieAccessInfo" class and then use the jar object.

[mako-taco]

This would be helpful to me as well