05-29 compile of using different surface for each asset
emergency commit of using one surface per asset
working version of assets on separate cairo bitmaps
rgb bitblitting to avoid yuv to/from conversion
eliminated spurious debug function from sdl-holder
control-x causes shutdown
fullscreen command line option
begin_ms and end_ms attributes support
audio ready flag always released on close out
start_stream renamed to open_stream
added start-at n seconds command line option with support