integrate a world map on http://ocaml.org/meetings/

[pw374]

I believe it'd be nice to have a world map that shows all those meetings

http://ocaml.org/meetings/

[agarwal]

Related to #81.

[agarwal]

Given our meetings page is in pretty bad shape, I don't see this issue making progress. Thus, I'd like to close it if @pw374 doesn't object. Please let me know or close it yourself. Thanks.