Removed unwanted white space.

Closes #443

Wikidata is a collaboratively edited knowledge base operated by the
Wikimedia Foundation.

Mixcloud requires OAuth authorization

I would like to contribute by adding the Behance API

Musikki requires AppKey and AppId that can be obtained in the Musikki dashboard

Removed the previously added 'Aviation' category, and added the ADS-B aircraft data API to the 'Transportation' category.

Created a new category for the ADS-B real-time aircraft flight status information API from ADS-B Exchange.

* Link to API containing food/drink review data for [Youtuber The Report of the Week](https://www.youtube.com/user/TheReportOfTheWeek)