Overlay Support and more

Big thanks to @DeadMor0z for the headline feature of this release. Elite Observatory can now use EDMCOverlay to display notifications! They look pretty slick.

Also, while it wasn't in this release per sé, some new values are available for custom criteria (and have been since v0.5.20.067 in March), but are now documented. These values are ParentType, AtmosphereType, and AtmosphereComposition. See the custom criteria documentation for details.

Other fixes in this release:

• Another attempt at fixing window size/location not saving properly.
• Stopped endless authentication failure loop in cAPI.
• Notification popup should now resize to avoid cutting off text.