changed all unix-only dependencies

There were several locations with unix-only dependencies. These were
causing errors when running in a windows console. Wrapped all of these
with try logic. Now it all runs in windows without any errors.
Yeah, that's my fault. I made that hack to get it to work and never tracked down why that work-around was successful. The reason is that on Windows for some reason the "run_time" is always None. Which is happening in windows for some reason. I can spend some time tracking that down. If you have any clues as to where that value is written it might go faster.