[FIX] whitespace
[FIX] website layout changed, adapted

The layout of the website has changed. I adapted to the new
layout. LWP::UserAgent seems to have problems with the new design so I
switched to Mojo::UserAgent.
Make search for cookie more robust
[DOC] synopsis fixed

Synopsis did not contain the name of the function
"cookie" in the use line. Therefore, the example
usage did not work. Well, it does now.