Fix link to Spotify's Web API

Replaced link to Spotify's Web API with one that points to the Web API's landing page. (The old link pointed to a migration page from the old Web API.)

Added Riot Games API to Games

Remove duplicate

Sunrise & Sunset

http://sunrise-sunset.org/api

> We offer a free API that provides sunset and sunrise times for a given latitude and longitude.

> Please note that attribution is required if you use our API. Check "Usage limits and attribution" section below for more information.

British National Bibliography

> The BNB Linked Data Platform provides access to the British National Bibliography published as linked open data and made available through SPARQL services.  Two different interfaces are provided:  a SPARQL editor, and /sparql a service endpoint for remote queries. Alternatively, use the search box below to enter a plain text term.

Added via my blog post https://shkspr.mobi/blog/2016/05/easy-apis-without-authentication/

Fix #195 (just a generic dev center, no API)

Removes extra Health table

Remove API Only (dead link)

Site returns a "welcome to nginx" page

Added 18F USA Government