[Dillo-dev] [patch]: more doxygen fixes

Doxygen is missing some methods because it's not smart enough about namespaces and sometimes thinks that the signatures of the declaration and the definition are different when they are not. You can see the warnings in its output (hint: redirect stdout to /dev/null to extract the warnings from the noise). Patch attached that adds some explicit namespace qualifiers. This removes doxygen's confusion, fixes the docs and silences the warnings. Regards, Jeremy Henty