Add code for coloured progressbars to CProgressBar class. This
allows to deprecate the CScale code completely (is not used anymore)
and, in a follow-up step, make the progress bar style runtime configurable.
TODO: documentation ;)
check if all progressbars still behave the same
git-svn-id: file:///home/bas/coolstream_public_svn/THIRDPARTY/applications/neutrino-experimental@131 e54a6e83-5905-42d5-8d5c-058d10e6a962
