Add contribute button to open infra map

[crisner]

Fixes #337 (<=== Add issue number here)

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Thanks!

[crisner]

Work done:

• Added contribute button to open infra map layer in menu
• Added contribution url to layerData.json

Screenshot:

[sagarpreet-chadha]

🎉

[jywarren]

this is awesome!

…

On Mon, Jan 13, 2020 at 11:11 AM Sagarpreet Chadha ***@***.***> wrote: Merged #345 <#345> into master. — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#345?email_source=notifications&email_token=AAAF6J43T4VPNBIBZMUFLCDQ5SGQLA5CNFSM4KGCPXG2YY3PNVWWK3TUL52HS4DFWZEXG43VMVCXMZLOORHG65DJMZUWGYLUNFXW5KTDN5WW2ZLOORPWSZGOV53J4YQ#event-2943786594>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAAF6JZUGFBH4PQC724LVXLQ5SGQLANCNFSM4KGCPXGQ> .