Changing `weather_is_safe` to `is_safe` to account for other aspects of system; fixing `is_dark` method and adding to `is_safe`
Changing `weather_is_safe` to `is_safe` to account for other aspects of system; fixing `is_dark` method and adding to `is_safe`

AstroHuntsman/POCS,panoptes/POCS,panoptes/POCS,AstroHuntsman/POCS,joshwalawender/POCS,panoptes/POCS,joshwalawender/POCS,panoptes/POCS,AstroHuntsman/POCS,AstroHuntsman/POCS,joshwalawender/POCS