Add Antarctica (AQ) flag

[mesosoi]

My idea is to add Antarctica flag, even if it is unofficial, we already have flags not only for countries but for continents, too, and we are missing Antarctica. Code: AQ.

[yammadev]

Hello @mesosoi, which one will it be? Maybe we can use the Graham Bartram's proposal, what do you think?

[mesosoi]

Hello @mesosoi, which one will it be? Maybe we can use the Graham Bartram's proposal, what do you think?

Hello @yammadev. That's a good idea, this flag has a similar style to other continents' flags in this repository, I also use it on my own site.