Change URLs of backend

[sheoranjs24]

Many backend URLs are same as front-end URLs. This may result in conflict if we turn on HTML5 mode. We should either append /api/ to backend URLs or use api.belocalvictoria.me.

Tasks List:

• [X] Setup sub-domain for REST API.

• [x] Configure nginx for sub-domain.

  Option 1:  Use 'subdomain.domain' with both http & https => we need to buy a new wildcard SSL certificate.
  Option 2:  Use 'domain/subfolder' with both http & https => we can use existing SSL certificate.

• [x] Change front-end URLs to point to new URL.
• [x] Test that everything is working fine.
• [x] Update Wiki.

[sheoranjs24]

I can take a look at it.

[scottlow]

I think a good approach would be to use api.belocalvictoria.me (this is what Twitter does).