Add Vagalume to Music category

Avoid service duplication in README (see: https://github.com/toddmotto/public-apis/pull/259#issuecomment-269635584).

https://developer.riotgames.com/docs/api-keys

Removed Hummingbird and updated with the Kitsu api details.

Source: https://medium.com/heykitsu/hummingbird-is-dead-long-live-kitsu-bda6ccfbbcce#.xixj9r30c
https://forums.hummingbird.me/t/kitsu-api-documentation/33367

Add Google Drive API

A section title of "exchange" is a bit vague when searching for a currency API, so add "currency" to the section title to make life, and searching, easier.

re-ordered health section

added diabetes api

Discogs uses/requires OAuth.

Added the "WhereIsMyTransport" transportation API.

Similar to the Media section, by moving the Planets section into Science, it creates a more concise way for users to search (i.e. no need to check Science, and then go back and look for another section to cover what they are looking for).

Update Alphabetical ordering of P's and header size of Photography