Make it run on non-Linux systems

[mxey]

My commits make the info-beamer run on OS X and should work on other non-Linux systems. I have done a quick test to confirm it still works on Linux :)

Replacing inotify is not easily possible, so for now I have implemented shotgun reloading: Once every second all the nodes are completely reloaded. This is of course much less efficient, but should be enough to enable development on Macs ;-)

I hope to add a more efficient change monitoring.