Display apparent altitude, not true altitude in statusbar and details dialog.

Also, added some debug code: when you press "Q", it dumps a series of angle values, followed by their value after refraction correction, followed by the value after the inverse correction. The values in columns 1 and 3 are not quite the same; they differ by up to a few arcseconds.

TODO: SkyObject::riseSetTime() does not take refraction into account, so if you right-click on an object that is just above the south horizon, the popup menu may indicate that it never rises!