using multiprocessing.Semaphore instead and using a timeout so it won't block inifinite
using multiprocessing.Semaphore instead and using a timeout so it won't block inifinite

svn path=/branches/slideshow-python/; revision=806

ext/slideshow-frontend,ext/slideshow,ext/slideshow,ext/slideshow,ext/slideshow,ext/slideshow,ext/slideshow-frontend,ext/slideshow-frontend,ext/slideshow