setup-xbmc-release: use a list of URLs instead of a single URL
setup-xbmc-release: add mirror/ in addition to mirror/nightlies to URLs to try
setup-xbmc-release: xbmc-rbp-20130930-speed => xbmc-rbp-20140104
config-files: add symlinks from ~/.xbmc-current => /opt/xbmc-bcm for config files