[UX] consistent playback behavior for music and video
[cmake] add helper function for addon dependency handling
[binary addons] cmake: automatic dependency resolution
[binary addons] add screensavers.rsxs
[binary addons] add visualizations fishbmc, goom, projectm, spectrum, waveform
remove rsxs from tree
remove visualizations fishbmc, goom, projectm, spectrum, waveform from tree
added: special setting __addonpath__ to libXBMC_addon::GetSettings()

returns the path for an addon
[depends] use central include file for binary-addons build