Lots of places hat casts from (const char*) to (char *) to silence
a "deprecated conversion" warning. Instead of casting (which is
inherently wrong), fix up the libxmltree interfaces.
git-svn-id: file:///home/bas/coolstream_public_svn/THIRDPARTY/applications/neutrino-experimental@117 e54a6e83-5905-42d5-8d5c-058d10e6a962