Make OS X "Hide" command work correctly
Merge pull request #189 from CaesarSchinas/cmd-keys

Make OS X "Hide" command work correctly
Improve error handling on invalid S57 chart.000 load attempt.
Correct OpenGL keyboard pan rendering logic while hilight is enabled (FS#1570)
Improve overzoom fog effect color selection for dusk/night modes.
Correct OpenGL setup for Parallels virtual machine on Mac host (FS#1566)
Merge remote-tracking branch 'upstream/master'