#1 switch cardinal points

[Martin]

Hi Emmanuel!
First I'd like to thank you. You made an excellent application!

And I'd like to ask you, if would be possible to add an option to "mirrorly" switch the Sky View.
To be more clear - switch cardinal points like this:
Keep N and S and switch
E -> W
W -> E

Thank you for your actual effort!

[Emmanuel ZURMELY]

Ok, I will plan this feature for the next release.