[scrapers] Support XSLT transforms (XML->XML) in the scrapers
[scrapers] example XSLT based scraper for musicbrainz albums... all of the regexp stuff is pretty much redundant now
[WIN32] added libxslt libxml2 and fixed compilation
[WIN32] added scripts to download libxslt and libxml
[WIN32] delete libxm dlls on uninstall and add libxslt