While I have a temporary solution in place that should determine the location if CoreLocation doesn't, getting the times from CoreBrightness will be more accurate. This will also mean Shifty will not need location permissions, which is a plus. I really don't want to take this out of beta without getting the times from the system, but I don't think I can figure this out myself.

For background, see discussion in #14

@saagarjha @LumingYin