Wire up to backend

[quorth0n]

• [x] Renders nation/entity data on server from backend
• [x] Renders territorial data on client from server

API is compatible with latest master on the backend repository.

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[amaury1093]

@whirish Using the test metadata, I manually put myself in 0055/01/01 (via the URL bar), but still cannot see any territories. How did you test?

[quorth0n]

@amaurymartiny See #25. I manually changed the date to something post 100 via the admin intetace