Added FHIR to "Health" API section

Per recommendation, moved this new link to "Test Data" section since data contained by the API is "dummy data" conforming to the FHIR spec.

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Add PiXHost API to readme

Publicly available test data conforming to the Fast Healthcare Interoperability Resources (FHIR) spec.

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Added FavQs Quote API

Another Quotes API. It provides various options to get quotes and perform operations like Update, Delete, Up-vote, Favourite, Hide, Tag on a quote. Random Quote doesn't require API key. You can request quotes from a specific category as well.

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Add IG.com

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add Pixabay API

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Create Mock Data section

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Add France open data API

Update HTTPS support

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Add a 'Jokes' API

Adding more apis

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This change adds a 'Jokes' API to the "Games and Comics" section.

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Adding QR code

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Adding QR code API to development section

Add Plaid API to finance section