Request object must contain all useful data

[jandudek-gdc]

We introduced a Request class as an abstraction of a http request (instead of HttpServletRequest). Now we must ensure it contains all useful data (cookies for example)

[jandudek]

It seems cookies are the only concept not covered by the Request class. However since these are nothing but request/response headers they can be handled by the headers related methods. Moving this to 1.1.0