Add Textalytic to the services category

Author: Jeffrey Flynt

README.md

@@ -216,6 +216,7 @@ NLP as API with higher level functionality such as NER, Topic tagging and so on
 - [Microsoft Cognitive Service](https://azure.microsoft.com/en-us/services/cognitive-services/text-analytics/)
 - [TextRazor](https://www.textrazor.com/)
 - [Rosette](https://www.rosette.com/)
+- [Textalytic](https://www.textalytic.com) - Natural Language Processing in the Browser with sentiment analysis, named entity extraction, POS tagging, word frequencies, topic modeling, word clouds, and more.
 
 ### Annotation Tools