Fixed crash (when clicking on empty friend list).
Fixed crash when clicking on empty achievement list.
Added static template function to CurrentUser to create html requests,
which will prefill the HTML request with the details of the current user.
So far used only in online_profile.
Fixed one problem with linux compilation.
Another try to fix linux compilation.
Merge branch 'master' of github.com:supertuxkart/stk-code
For now avoid the use of the template, since it doesn't work on linux.
update to upstream