7 univeral capture of stdout and stderr and handling of child process pid for windows, *nix, etc.
11 http://github.com/ahoward/systemu
12 http://rubyforge.org/projects/codeforpeople/
20 - versioning issue. new gem release.
23 - updates for ruby 1.9.1
30 - fixed handling of background thread management - needed
31 Thread.current.abort_on_exception = true
33 - fixed reporting of child pid, it was reported as the parent's pid before