Update README.md

Typo fix

Removed Certly

Updated Clearbit Logo auth

Reason: Website does not work anymore

* Adding CalendarIndex Holidays API

* Removing . from the end of the description

* Remove "API" from Description

Fix casing of GitHub "h"

This is a nitpicking thing but GitHub is spelled with a capital H.

* Add Nager.Date Public holiday project with api

* Update README.md

Closes #758

Combining PRs #728 and #741.

* crypto apis

* tick fixes

* chasing coins api

* Added CoinLayer API

* Fixed CoinLayer description

* Fixed description

* Add trash nothing

* Remove exclamation point

* Title case

* Adds Bored API

* Removes "API" from title

* Update README.md

Added currents api to available list

* Forum to plural

Fixes Issue #730

GDAX is being replaced/rebranded as Coinbase Pro

* crypto apis

* tick fixes

* bitcoinAverage API

Update Photography APIs

Update README.md

Fixes Issue #736 

For reference: https://open.fda.gov/about/updates/2018_06_22_new_look_same_great_api

Typo in README

Adding Bitcoin Cash to Coinbase description

* crypto apis

* tick fixes

Fixes issue #720

Added Cloudmersive Natural Language Processing

Incorporated feedback from previous pull request 713

* added OOPSpam API

* added OOSpam

removed API from the name